Conference Agenda

Topical Meetings and Sessions:

TOM 1 - Silicon Photonics and Guided-Wave Optics
TOM 2 - Computational, Adaptive and Freeform Optics
TOM 3 - Optical System Design, Tolerancing and Manufacturing
TOM 4 - Bio-Medical Optics
TOM 5 - Resonant Nanophotonics
TOM 6 - Optical Materials: crystals, thin films, organic molecules and polymers, syntheses, characterization and devices
TOM 7 - Thermal radiation and energy management
TOM 8 - Nonlinear and Quantum Optics
TOM 9 - Optics at Nanoscale (ONS)
TOM 10 - Optical Microsystems (OMS)
TOM 11 - Waves in Complex Photonic Media
TOM 12 - Optofluidics
TOM 13 - Ultrafast Optical Technologies and Applications
TOM 14 - Advances and Applications of Optics and Photonics
EU Project Session
Early Stage Researcher Session organised by SIOF
Grand Challenges of Photonics Session

More information on the Topical Meetings

Select a date or location to show only sessions at that day or location. Select a single session for detailed view (with abstracts and downloads when you are logged in as registered attendee). Plenary speeches, tutorials, and Early Researcher session will be updated very soon. Thank you for your patience!

Please note that all times are shown in the time zone of the conference. The current conference time is: 18th Aug 2022, 18:56:48 CEST

 
Filter by Track or Type of Session 
Only Sessions at Location/Venue 
 
 
Session Overview
Location: Aula 8
1st Floor
Date: Monday, 13/Sept/2021
14:00 - 15:45Tutorial: Fundamentals and applications of metamaterial silicon photonic devices (lecturer online)
Location: Aula 8
Session Chair: Emilija Petronijevic, Sapienza University of Rome, Italy
 
Tutorial
ID: 550
Tutorial Speeches

Fundamentals and applications of metamaterial silicon photonic devices

Jens Schmid

National Research Council Canada, Canada

The use of on-chip metamaterials engineered at the subwavelength scale has expanded the design space of silicon photonics. Many subwavelength engineered waveguide devices with unprecedented performance have been demonstrated in recent years. In this tutorial, an overview of the fundamentals and applications of metamaterials in integrated optics and the recent advances in this surging field will be presented.

 
Date: Tuesday, 14/Sept/2021
10:15 - 11:45TOM9 S01: Optics at Nanoscale (ONS): Metastructures
Location: Aula 8
Session Chair: Vito Mocella, CNR, Italy
 
10:15 - 10:45
Invited
ID: 161 / TOM9 S01: 1
TOM 9 Optics at Nanoscale (ONS)

On the generalized Snell-Descartes laws for metasurfaces

Emmanuel Rousseau, Didier Felbacq

Laboratoire Charles Coulomb - University of Montpellier - CNRS, France

This presentation is about the generalized laws of reflection and refraction for metasurfaces. We discuss in detail their derivation starting from questioning the original proof. We discuss two families of metasurfaces, namely refractive metasurfaces, made of a refractive layer with position-dependent optical index and diffractive metasurfaces made of scatterers. We conclude that some generalized Snell-Descartes laws can be defined but they differ from the ones reported in the literature.



10:45 - 11:15
Invited
ID: 438 / TOM9 S01: 2
TOM 9 Optics at Nanoscale (ONS)

Dielectric metasurfaces for emission efficiency control at telecom wavelengths

Boris Kalinic1, Tiziana Cesca1, Ionut Balasa1, Concita Sibilia2, Giovanni Mattei1

1University of Padova, Italy; 2Sapienza University of Rome, Italy

Recently, a huge effort has been directed to engineering the radiative properties of an emitter to obtain increasingly efficient photonic sources in the telecom wavelength range.

We investigate the modification of the room temperature luminescence (radiative decay rate and intensity) at λ = 1540 nm from Er3+ ions coupled to different metasurfaces, like Si-based arrays of disk nanoslots or nanostructured phase-change materials (VO2). These exhibit a rich set of high Q-factors modes, which can be effectively coupled to the mixed electric dipole (ED) and magnetic dipole (MD) transitions of Er3+



11:15 - 11:45
Invited
ID: 288 / TOM9 S01: 3
TOM 9 Optics at Nanoscale (ONS)

Optical properties of porous silicon nanowires at high pressures

Javad Rezvani1,2, Yimin Mijiti1, Andrea Di Cicco1

1Physics Division, School of Science and Technology, University of Camerino, 62032 Camerino (Italy); 2Advanced Materials Metrology and Life Science Division, INRiM (Istituto Nazionale di Ricerca Metrologica), Strada delle Cacce 91, Torino, Italy.

Optical properties of porous silicon nanowires (NWs) with homogenous lateral dimensions of 90 nm are investigated by Raman scattering experiments along isothermal pressure cycles in a diamond anvil cell. Experiments were performed at variable temperatures up to 400°C and pressures of 30 GPa comparing the bulk Si and porous NWs. Our results evidence that the phase properties are significantly affected by the initial structure, size and shape distribution of the materials especially at low dimension. The exotic phase transitions with distinct properties in Si NWs lead to advanced future applications.

 
14:15 - 15:45TOM9 S02: Optics at Nanoscale (ONS): Plasmonics I
Location: Aula 8
Session Chair: Concita Sibilia, Università di Roma La Sapienza, Italy
 
14:15 - 14:45
Invited
ID: 204 / TOM9 S02: 1
TOM 9 Optics at Nanoscale (ONS)

Plasmonic lattices for controlling light-matter interaction.

Giuseppe Pirruccio1, Hugo Lara1, Cecilia Noguez1, Mohammad Ramezani2, Concita Sibilia3, Emilija Petronijevic3, Tiziana Cesca4, Giovanni Mattei4, Michal Urbanek5

1UNAM, Mexico; 2Tu/e, The Netherlands; 3Sapienza, Italy; 4Universita di Padova, Italy; 5CEITEC, Czech Republic

Light-matter interaction can be controlled by means of resonant nanostructures. Bravais plasmonic lattices sustaining collective modes can be used to modify absorption and fluoresce of coupled emitters. Multipolar modes in achiral lattices enable engineering an enhanced near field chiroptical response. Non-Bravais lattices, such as the honeycomb one, possess an extra degree of freedom associated with the relative position of the constitutive sublattices. This is directly related to the relative phase of the modes of each sublattice and thus permits tailoring the optical response of the array.



14:45 - 15:00
ID: 282 / TOM9 S02: 2
TOM 9 Optics at Nanoscale (ONS)

Exciton-polariton in a dye-doped metal-insulator-metal structure

Aniket Patra1,2, Vincenzo Caligiuri2, Roman Krahne1, Antonio De Luca2

1Italy Institute of Technology, Italy; 2University of Calabria, Italy

We experimentally and theoretically demonstrate how, by changing the density of the excitons in an organic dye inside the cavity, one can tune the light-matter interaction in Metal-Insulator -Metal (MIM) system. Furthermore, we theoretically study the light-matter interaction in a double cavity MIM system, using the same organic dye, in which the strong light-matter signature was observed.



15:00 - 15:15
ID: 353 / TOM9 S02: 3
TOM 9 Optics at Nanoscale (ONS)

Tunable and Highly Ordered Array of Au Nano-Holes: preparation, characterization, and functional application

Maria Grazia Manera, Adriano Colombelli, Daniela Lospinoso, Roberto Rella

CNR - IMM, Italy

The realization of periodic plasmonic nanostructures featuring macroscopic scale and easily controllable size and lattice spacing is a challenging achievement for low-cost nanofabrication tools. In this work, a periodic array of metal nanostructures have been prepared on large-area by exploiting modified nano-sphere lithography (NSL) fabrication technique. A valuable ability is to couple the versatility offered by NSL with post-processing tools for the properly engineering of plasmonic nanoparticles.



15:15 - 15:45
Invited
ID: 508 / TOM9 S02: 4
TOM 9 Optics at Nanoscale (ONS)

Listening to metal nanoparticles super-aggregates by photoacoustics

Roberto Li Voti1, Grigore Leahu1, Concita Sibilia1, Roberto Matassa2, Giuseppe Familiari2, Sara Cerra3, Tommaso Alberto Salamone3, Ilaria Fratoddi3

1Department of Basic and Applied Sciences for Engineering (SBAI), Sapienza University of Rome, Via A. Scarpa 14, 00161 Rome Italy.; 2Department of Anatomical, Histological, Forensic and Orthopedic Sciences, Section of Human Anatomy, Sapienza University of Rome, Via A. Borelli 50, 00161, Rome, Italy.; 3Department of Chemistry, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy.

Photoacoustic spectroscopy revealed to be a robust and non-destructive technique for determining self-assembled nanostructures. The use of a straightforward approach based on photoacoustic detection allows to listen to both the absorption and scattering phenomena generated by nanoparticle suspensions. Photoacoustic results are compared with dynamic light scattering and local transmission electron microscopy measurements, allowing to obtain a well-defined interpretation of super-aggregates. This innovative morpho-optical approach opens new perspectives for advanced biomedical and structural applications.

 
16:15 - 17:45TOM9 S03: Optics at Nanoscale (ONS): Plasmonics II
Location: Aula 8
Session Chair: Didier Felbacq, université de Montpellier, France
 
16:15 - 16:45
Invited
ID: 485 / TOM9 S03: 1
TOM 9 Optics at Nanoscale (ONS)

Is practicle perfect optical transmission possible?

Loic Le Cunff1, Hind Kadiri1,2, Sambav Kumar1, Valentin Gaté3, Daniel Turover3, Gilles Lérondel1

1University of Technology of Troyes, France; 2Napa Technologies, France; 3SILSEF, France

In theory, subwavelength nanostructures should allow perfect transmission to be achieved thanks to refractive index matching. Moreover, the nanostructures could confer to the surface new functionalities such as anti-icing properties. We will in this presentation experimentally and theoretically the feasibility and intrinsic limitations of the approach. As an example, we will show how a silicon/air interface can transmit more light in the mid-IR than an air/glass interface in the visible while becoming super hydrophilic. As a perspective, the generalization of the approach to different kinds of material and spectral ranges will be discussed.



16:45 - 17:00
ID: 358 / TOM9 S03: 2
TOM 9 Optics at Nanoscale (ONS)

Circular dichroism and extraordinary transmission in metal films with elliptical nanohole arrays

Emilija Petronijevic1, Concita Sibilia1, Hanan Ali2, Giovanni Pellegrini2, Lucio C. Andreani2

1Sapienza University of Rome, Italy; 2University of Pavia, Italy

We theoretically study circular dichroism (CD) in hexagonal and square arrays of elliptical nanoholes etched in thin metallic layers on a glass substrate. CD resonances in transmission and in absorption spectra fall within extraordinary transmission (EOT) peaks from the holes and are associated with coupling to surface plasmon-polaritons at the interfaces with the metal. The conditions for maximizing the CD as a function of geometrical parameters are determined.



17:00 - 17:15
ID: 192 / TOM9 S03: 3
TOM 9 Optics at Nanoscale (ONS)

Numerical study of the optical properties of disordered metallic grooves by a one-mode analytical model

Denis Langevin1, Julien Jaeck1, Eslam El Shamy1, Riad Haïdar1,2, Patrick Bouchon1

1ONERA/DOTA, France; 2École polytechnique, France

Metallic grooves of sub-wavelength dimensions behave like Fabry-Perot nano-cavities able to resonantly enhance electromagnetic fields. In this paper, the consequences of positional disorder on the optical behavior of groove arrays are studied. We show, with a specifically developed simulation tool, that disorder leads to a redistribution of energy compared to the periodic case.



17:15 - 17:30
ID: 418 / TOM9 S03: 4
TOM 9 Optics at Nanoscale (ONS)

Optical properties of ultrathin Ag films: the role of porosity and morphology

Luca Ciambriello, Emanuele Cavaliere, Luca Gavioli

Università Cattolica del Sacro Cuore, Italy

Understanding the optical response-structure and morphology relation of ultrathin optical Ag films is crucial yet not properly addressed. We present new results obtained through a novel tool calculating the effective dielectric functions employing reflectance and transmission optical data. The film structure is modelled as a multi-layer system taking into account in particular the film porosity and roughness and the data are fitted with meaningful physical quantities (roughness, scattering time, porosity). We describe the dependence on film thickness and the major phisical parameters influence on the dielectric function.



17:30 - 17:45
ID: 310 / TOM9 S03: 5
TOM 9 Optics at Nanoscale (ONS)

Violation of the Einstein relations in single-mode nanolasers

Andrey A Vyshnevyy

MIPT, Russian Federation

Spontaneous and stimulated emission and the Einstein relations between them lie at the core of the laser theory. While the radiative processes in the cavities are considered to be well understood, we show that, even in the weak coupling limit, many-body effects arising from correlated dynamics of the laser cavity and the gain medium's electric polarization significantly affect emission rates, hence lead to the violation of the Einstein relations.

 
18:00 - 19:30TOM9 S04: Optics at Nanoscale (ONS): Chiral structures
Location: Aula 8
Session Chair: Alessandro Belardini, Sapienza Università di Roma, Italy
 
18:00 - 18:15
ID: 303 / TOM9 S04: 1
TOM 9 Optics at Nanoscale (ONS)

Spatially coherent helical and non-helical nano-heterostructures with tunable plasmonic response

Ufuk Kilic1, Matthew Hilfiker1, Alexander Ruder1, Rafal Korlacki1, Rene Feder2, Frank Frost3, Mathias Schubert1, Christos Argyropoulos1, Eva Schubert1,3

1University of Nebraska-Lincoln, Department for Electrical and Computer Engineering and Nebraska Center for Materials and Nanoscience, 418 East Nebraska Hall, 68588 Lincoln, Nebraska, U.S.A.; 2Fraunhofer Institute for Microstructure of Materials and Systems, Walter-Hülse-Straße 1, 06120 Halle, Germany Germany; 3Leibniz-Institute of Surface Engineering (IOM), Permoserstraße 15, 04318 Leipzig, Germany

We present the plasmonic response of chiral and non-chiral metasurfaces fabricated by oblique angle deposition. Optical properties are extracted from line shape analysis of experimental data from spectroscopic 4 x 4 Mueller Matrix element measurements and experimental findings are supported by finite element simulations to verify the physical nature of the observed photonic behavior. The spectral tunability of plasmonic resonances will be discussed in terms of material design. Specifically, giant chiro-optical response in heterostructure helices is observed depending on the handedness of spirals and is represented by Kuhn’s dissymmetry factor.



18:15 - 18:30
ID: 482 / TOM9 S04: 2
TOM 9 Optics at Nanoscale (ONS)

Broadband near-infrared chiral properties of metasurfaces fabricated by nanosphere lithography

Emilija Petronijevic1, Alessandro Belardini1, Tiziana Cesca2, Carlo Scian2, Giovanni Mattei2, Concita Sibilia1

1Sapienza University of Rome, Italy; 2University of Padova, Italy

Plasmonic nanostructures with chiral shapes are able to tailor chiro-optical phenomena at the nanoscale, which is important for various applications spanning from chiral sensing to circularly polarized light emission. Here we use the cost- and time-effective nanosphere lithography and tilted metal deposition to fabricate various asymmetric geometrical shapes of plasmonic nanostructures organized in metasurfaces. We then perform broadband extrinsic chirality characterization in the near-infrared range. We demonstrate rich, resonance-governed, spin-dependent extinction.



18:30 - 19:00
Invited
ID: 549 / TOM9 S04: 3
TOM 9 Optics at Nanoscale (ONS)

New nonlinear chiroptical effects: second and third harmonic scattering from chiral nanoparticles

Ventsislav K, Valev

University of Bath, United Kingdom

Following our recent discovery of the Hyper Rayleigh Scattering Optical Activity (HRS OA) at the second harmonic frequency of illumination, we show that the effect is general and present a demonstration of HRS OA at the third harmonic frequency. The new effects take place in minuscule volumes of illumination (tens of µm3), which enabled the first chiroptical characterization of a single chiral nanoparticle revolving freely in an isotropic liquid environment. Our results open the way to technological applications of chiroptical characterization in tiny volumes, such as microdroplets.

 
Date: Wednesday, 15/Sept/2021
8:15 - 9:45TOM9 S05: Optics at Nanoscale (ONS): Sensing
Location: Aula 8
Session Chair: Concita Sibilia, Università di Roma La Sapienza, Italy
 
8:15 - 8:30
ID: 194 / TOM9 S05: 1
TOM 9 Optics at Nanoscale (ONS)

Towards Nanoscale imaging with Attosecond Pulses: Holography-enhanced broadband lensless imaging in the XUV

Sici Wang1,2, Wilhelm Eschen1,2, Chang Liu1,2, Michael Steinert2, Thomas Pertsch2,3, Jens Limpert1,2,3, Jan Rothhardt1,2,3

1Helmholtz-Institute Jena; 2Institute of Applied Physics, Friedrich-Schiller-University Jena; 3Fraunhofer Institute of Applied Optics and Precision Engineering

We present our recent advances in holography-enhanced lensless imaging in the extreme ultraviolet. By combining multi-reference Fourier-Transform holography with a broadband phase retrieval algorithm, we were able to demonstrate a spatial resolution of 34 nm with an XUV bandwidth as large as 5.5 eV supporting a Fourier-limited pulse duration of 380 as. This demonstrates the feasibility of lensless imaging far beyond the temporal coherence limit and paves the way for ultrafast imaging with high spatial and temporal resolution.



8:30 - 9:00
Invited
ID: 517 / TOM9 S05: 2
TOM 9 Optics at Nanoscale (ONS)

Surface wave photonic crystal biochips for cancer biomarkers detection

Francesco Michelotti1, Alberto Sinibaldi1, Agostino Occhicone1, Tommaso Pileri1, Patrizio Giacomini2, Matteo Allegretti2, Norbert Danz3, Peter Munzert3

1Department of Basic and Applied Science for Engineering, SAPIENZA University of Rome, Rome, Italy; 2Regina Elena National Cancer Institute IRE, IRCCS, Rome, 00144, Italy; 3Fraunhofer Institute for Applied Optics and Precision Engineering IOF, Jena, Germany

The increasing demand for non-invasive diagnostic tools drives the development of novel approaches for biomarkers detection. Sensors based on Bloch surface waves (BSW) sustained by 1D photonic crystals were demonstrated as a practical route to improve the resolution. We developed BSW biochips operating either in a label-free manner, by tracking the BSW resonance, or by resonant fluorescence excitation/detection of suitable labels. The detection of the breast cancer ERBB2 clinical biomarker is demonstrated, with a fluorescence resolution below 0.5ng/ml for ERBB2 in cell lysates, below the 15ng/ml threshold in human serum.



9:00 - 9:15
ID: 316 / TOM9 S05: 3
TOM 9 Optics at Nanoscale (ONS)

Nanofluidic sensing with nanostripe gratings on a free-standing SiN waveguide

Giacomo Manzato1, Maria Caterina Giordano1, Marco Centini2, Francesco Buatier de Mongeot1

1Università degli Studi di Genova, Italy; 2Sapienza Università di Roma, Italy

We demonstrate versatile nanofabrication of Au nanostripe gratings supported on free-standing Si3N4 membranes. By exploiting high resolution nanolithography, a fine tuning of the photonic modes is achieved across the VIS-NIR spectrum, coupling the incident light into multiple guided modes in the thin supporting membrane (200 nm). Tracking their spectral shift is a straightforward application of the system as a nanofluidic refractive index sensor, measuring the signal of transmitted light in a simple optical microscopy configuration, with good RI sensitivity (180nm/RIU) competitive with respect to the state of art nanofluidic sensors.



9:15 - 9:45
Invited
ID: 349 / TOM9 S05: 4
TOM 9 Optics at Nanoscale (ONS)

Diagnostic potential of disorder: development of an innovative nanostructured platform for rapid, label-free and low-cost analysis of genomic DNA

Valentina Mussi1, Mario Ledda2, Davide Polese1, Luca Maiolo1, Debadrita Paria3, Ishan Barman3, Maria Grazia Lolli2, Antonella Lisi2, Emilio Nicola Maria Cirillo4, Claudio Durastanti4, Annalisa Convertino1

1Institute for Microelectronics and Microsystems, National Research Council, Rome, Italy; 2Institute of Translational Pharmacology, National Research Council, Rome, Italy; 3Department of Mechanical Engineering, Johns Hopkins University, Baltimore, USA; 4Department of Basic and Applied Sciences for Engineering, Sapienza University, Rome, Italy

A novel diagnostic platform will be presented for reliable, quick, and label-free analysis of genomic DNA. The technique leverages the unique capability of a disordered array of silver coated silicon nanowires (Ag/SiNWs) to interact with biomolecules, and Raman spectroscopy. The analysis is performed by depositing aqueous droplets of target DNA on the Ag/SiNWs, and acquiring Raman maps after sample dehydration. Principal component analysis is then applied to distinguish healthy and cancer cell DNA, the discrimination being only related to spectral features associated to the interfacing between DNA and the NWs.

 
11:15 - 12:45TOM9 S06: Optics at Nanoscale (ONS): Quantum effects I
Location: Aula 8
Session Chair: Mario Bertolotti, Sapienza University of Rome, Italy
 
11:15 - 11:30
ID: 287 / TOM9 S06: 1
TOM 9 Optics at Nanoscale (ONS)

Exploring quantum mechanical effects in subnanometer plasmonics

Giulia Giannone1,2, Szymon Smiga3, Stefania D'Agostino1,2,4, Fabio Della Sala1,2,5

1IIT@UNILE Center for Biomolecular Nanotechnologies, Italy; 2Department of Mathematics and Physics “E. De Giorgi”, University of Salento, Via Arnesano, Lecce, Italy; 3Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudzia ̧dzka 5, 87-100 Torun ́, Poland; 4Institute of Nanotechnology, National Research Council (CNR-NANOTEC), c/o Campus Ecotekne, via Monteroni, 73100, Lecce, Italy; 5Institute for Microelectronics and Microsystems (CNR-IMM), Via Monteroni, Campus Unisalento, 73100 Lecce, Italy

The extraordinary progress of nanofabrication techniques has allowed the accurate control of the morphology of nanostructures at the nanometer and subnanometer scale allowing the realization of plasmonic antennas with atomistic separation distances. The necessity to handle gaps approaching the Angstrom scale, has, thus, required a quantum-mechanical approach to the study of the plasmonic excitations. This work aims at shedding light on the charge transfer role in plasmonic excitations involving sub-nanometer separation distances among the considered metallic clusters by taking advantage from the subsystem formulation of Time-Dependent Density Functional Theory.



11:30 - 12:00
Invited
ID: 258 / TOM9 S06: 2
TOM 9 Optics at Nanoscale (ONS)

Monolithic semiconductor light sources for quantum photonic integration on Si

Abhiroop Chellu, Joonas Hilska, Jussi-Pekka Penttinen, Teemu Valtteri Hakkarainen

Optoelectronics Research Centre, Physics Unit, Tampere University, Finland

Semiconductor quantum dots (QDs) represent the state-of-the-art of deterministic sources of single and entangled photons for quantum photonics. However, so far there has been no feasible technology for scalable integration of the best QD emitters with the Si photonics platform. Here, we present a new, highly uniform semiconductor quantum system based on GaSb QDs formed in AlGaSb by filling droplet-etched nanoholes. These QDs provide narrow-linewidth excitonic emission at telecom wavelengths and allow direct epitaxial integration with the Si photonics platform.



12:00 - 12:45
Special Invited
ID: 506 / TOM9 S06: 3
TOM 9 Optics at Nanoscale (ONS)

Practical quantum communication and processing

Fabio Bovino

Sapienza University of Rome, Italy

Multirail Architecture encode the whole state space in a complex optical circuit, and it provides a novel class of small or intermediate-scale processors that allow “quantum supremacy” and practical implementation of quantum communication and authentication

 
16:15 - 17:45TOM9 S07: Optics at Nanoscale (ONS): Quantum effects II
Location: Aula 8
Session Chair: Alessandro Belardini, Sapienza Università di Roma, Italy
 
16:15 - 16:45
Invited
ID: 464 / TOM9 S07: 1
TOM 9 Optics at Nanoscale (ONS)

Ultrafast emission and detection of quantum emitters

Haritha Kambalathmana1, Abdul-Amid Fattah2, Amr Farrag1, Assegid M. Flatae1, Mario Agio1,3

1Laboratory of Nano-Optics, University of Siegen, Germany; 2Deggendorf Institute of Technology, Germany; 3National Institute of Optics (INO), National Research Council (CNR), Italy

We discuss theoretical and experimental results on the ultrafast emission and detection of quantum emitters. We employ nano-antennas, specifically gold nanocones, to accelerate the spontaneous emission rate of silicon-vacancy color centers in diamond by orders of magnitude to generate single photons with picoseconds timescales. Moreover, we implement an optical Kerr shutter under tight focusing to be able to detect such ultrafast single photons with time resolutions down to a few hundreds of femtoseconds.



16:45 - 17:15
Invited
ID: 459 / TOM9 S07: 2
TOM 9 Optics at Nanoscale (ONS)

Intensity squeezed States of lLght from FWM in hot alkali Vapors -Review of Results and Applications

Brana M Jelenkovic, Marija Curcic

Institute of physics, Belgrade Serbia

We review experimental and theoretical results of quantum properties of twin beams generated by the FWM in hot alkali vapors. Noise spectrum of the intensity difference of twin beams and dependence of squeezing on the range of FWM parameters is presented for the FWM in potassium. Relative intensity squeezing of -5.5 dB below SQL requires that potassium density and detuning of the pump and probe laser beams in the double Λ interaction scheme all fall in the rather narrow range.



17:15 - 17:45
Invited
ID: 171 / TOM9 S07: 3
TOM 9 Optics at Nanoscale (ONS)

Generation of nonclassical light in integrated nanophotonic resonators

Marco Liscidini

University of Pavia, Italy

Integrated micro- and nanostructures allow for the efficient generation of photon pairs via parametric fluorescence thanks to the enhancement of the light-matter interaction associated with the spatial and temporal light confinement. These systems grant an unprecedented control over the properties of the generated non-classical light, for the field enhancement can be engineered to enhance or suppress specific nonlinear processes. I will discuss the latest progresses in the generation of photon pairs in integrated devices from two-photon states in linearly uncoupled resonators to bright squeezed light in nanophotonic molecules.

 
Date: Thursday, 16/Sept/2021
8:15 - 9:45TOM9 S08: Optics at Nanoscale (ONS): Optical and NLproperties
Location: Aula 8
Session Chair: Concita Sibilia, Università di Roma La Sapienza, Italy
 
8:15 - 8:30
ID: 379 / TOM9 S08: 1
TOM 9 Optics at Nanoscale (ONS)

Doubly resonant photonic crystal cavities for efficient second-harmonic generation in III-V semiconductors

Simone Zanotti1, Momchil Minkov2, Shanhui Fan2, Lucio Andreani1,3, Dario Gerace1

1Università di Pavia, Italy; 2Stadnford University, Standford (USA); 3Institute for Photonics and Nanotechnologies IFN-CNR, Italy

Photonic crystals could offer a breakthrough to engineer highly efficient nonlinear processes in dielectric materials, due to their capability to confine light both in space and time. We designed a photonic crystal cavity in AlGaAs and GaN, aimed at enhanced second-harmonic (SH) generation, from a fundamental harmonic (FH) mode wavelength at 1550 nm matching a SH mode at 775 nm. Our results show that resonantly enhanced SHG can be achieved and properly optimized if the material structure and symmetry are considered.



8:30 - 8:45
ID: 120 / TOM9 S08: 2
TOM 9 Optics at Nanoscale (ONS)

Reconfigurable nonlinear emission in dielectric nanoantennas by light-induced thermo-optical effects

Michele Celebrano1, Davide Rocco2, Marco Gandolfi2,3, Attilio Zilli1, Francesco Rusconi1, Andrea Tognazzi2, Andrea Mazzanti1, Lavinia Ghirardini1, Eva.A.A. Pogna4, Luca Carletti2, Camilla Baratto3, Giuseppe Marino5, Carlo Gigli5, Paolo Biagioni1, Lamberto Duò1, Giulio Cerullo1,6, Giuseppe Leo5, Giuseppe Della Valle1, Marco Finazzi1, Costantino De Angelis2,3

1Politecnico di Milano, Italy; 2Università di Brescia, Italy; 3Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche; 4Istituto di Nanoscienze, Consiglio Nazionale delle Ricerche; 5Laboratoire MPQ, CNRS, Universitè de Paris; 6Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche

We present the first realization and experimental demonstration of the optical modulation of the second harmonic generation (SHG) from a single all-dielectric nanoantenna, controlled by a continuous wave laser source. We prove that even with moderate temperature changes (few tens of degrees), the emitted SHG power by the nanoantenna can be significantly modulated (up to 60%).



8:45 - 9:00
ID: 150 / TOM9 S08: 3
TOM 9 Optics at Nanoscale (ONS)

Second and third harmonic generation from gold nanolayers: experiment versus theory

Laura Rodríguez1, Jose Trull1, Crina Cojocaru1, Neset Akozbek2, Domenico De Ceglia3, Maria Vincenti4, Michael Scalora5

1Department of Physics, Universitat Politècnica de Catalunya, Rambla Sant Nebridi 22, 08222 Terrassa, Spain; 2AEgis Technologies Inc., 401 Jan Davis Dr., Huntsville, Alabama 35806, USA; 3Department of Information Engineering – University of Padova, Via Gradenigo 6/a, 35131 Padova, Italy; 4Department of Information Engineering – University of Brescia, Via Branze 38, 25123 Brescia, Italy; 5Aviation and Missile Center, US Army CCDC, Redsone Arsenal, AL 35898-5000 USA

Understanding accurately how light interacts with semiconductors, metals and dielectrics at the nanoscale is crucial if one is to properly engineer nano-devices. When the nanoscale is reached, light-matter interactions display new phenomena where conventional approximations may not always be applicable. In this work, we measure the efficiency of second and third harmonic generation from gold nanolayers. The experimental results are compared with numerical simulations based on a detailed microscopic hydrodynamic model that considers different effects playing a role in the nonlinear response, not usually considered by more generic models.



9:00 - 9:15
ID: 539 / TOM9 S08: 4
TOM 9 Optics at Nanoscale (ONS)

Coupling of waveguide mode and graphene plasmons

Jiri Petracek1, Jiri Ctyroky2, Vladimir Kuzmiak2, Pavel Kwiecien3, Ivan Richter3

1Brno University of Technology, Faculty of Mechanical Engineering, Institute of Physical Engineering, Technicka 2896/2, 61669 Brno, Czech Republic; 2CAS Institute of Photonics and Electronics, Department of Fiber Lasers and Nonlinear Optics, Chaberska 57, 18251 Prague, Czech Republic; 3Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Department of Physical Electronics, Břehova 7, 11519 Prague 1, Czech Republic

Photonic waveguides with graphene layers have been recently studied for their potential as fast and low-power electro-optic modulators with small footprints. We show that in the optical wavelength range of 1.55 µm, surface plasmons supported by the graphene layer with the chemical potential exceeding ~0.5 eV can couple with the waveguide mode and affect its propagation. This effect might be possibly utilized in technical applications as a very low-power amplitude modulation, temperature sensing, etc.



9:15 - 9:45
Invited
ID: 511 / TOM9 S08: 5
TOM 9 Optics at Nanoscale (ONS)

Ultrafast dynamics in quantum dots

Davide Boschetto1, Mateusz Weis1, Simon Mizrahi1, Emmanuel Péronne1, Junling Qu2, Erwan Bossavit2, Emmanuel Lhuillier2

1LOA, Laboratoire d’Optique Appliquée, ENSTA Paris/Ecole Polytechnique/CNRS, Chemin de la Hunière, 91761 Palaiseau cedex, France; 2Sorbonne Université, CNRS, Institut des NanoSciences de Paris, INSP, 75005 Paris, France

Quantum confinement allows ad-hoc material engineering for a large number of technological applications due to the sizeable energy gap linked directly to the crystal dimensions. In particular, it has been shown that colloidal quantum dots are very promising for new infrared-LED technologies.

We performed an extensive investigation of the ultrafast dynamics occurring in colloidal quantum dots, using a pump/probe configuration in the near infrared range. In particular, we show that a charge transfer dynamic can occurs between different types of quantum dots, allowing the enhancement of their infrared emitting properties.

 
11:15 - 12:45TOM9 S09: Optics at Nanoscale (ONS): Physical properties I
Location: Aula 8
Session Chair: Emilija Petronijevic, Sapienza University of Rome, Italy
 
11:15 - 11:45
Invited
ID: 354 / TOM9 S09: 1
TOM 9 Optics at Nanoscale (ONS)

Expansion(s) of electromagnetic fields on dispersive quasi normal modes

Guillaume Demesy

Institut Fresnel, France

In this presentation, an open source Quasi Normal Mode (QNM) solver based on Finite Elements will be presented. In typical cases encountered in photonics with dispersive materials and open geometries, computing the QNMs reduces to solving a Non Linear Eigenvalue Problem (NEP). Various linearization schemes will be detailed, as well as several intrinsic pitfalls of the method. Then, a QNM expansion onto the QNMs set will be introduced based on the Keldysh theorem. Finally, the resulting open source template model packaging all the features introduced will be presented.



11:45 - 12:00
ID: 540 / TOM9 S09: 2
TOM 9 Optics at Nanoscale (ONS)

BIC in waveguide arrays

Vladimir Kuzmiak1, Jiří Petráček2

1CAS Institute of Photonics and Electronics, Czech Republic; 2Institute of Physical Engineering, Brno University of Technology, Czech Republic

We propose a simple theoretical model based on the coupled-mode theory which allows to calculate the spectral properties and transmittance of the one-dimensional waveguide structures. The model was verified on the common coupled-waveguide array in which the existence of the symmetry-protected bound state in the continuum (BIC) was confirmed experimentally by Plotnik et al.[Phys.Rev.Letters 107, 28-31(2011)]. The method can be extended to topologically nontrivial lattices to explore the properties of the BICs protected by time-reversal symmetry (TRS).



12:00 - 12:15
ID: 271 / TOM9 S09: 3
TOM 9 Optics at Nanoscale (ONS)

Bound states in the continuum platform for enhanced refractive index imaging

Silvia Romano1, Maria Mangini2, Stefano Cabrini3, Erika Penzo3, Anna Chiara De Luca2, Ivo Rendina1, Vito Mocella1, Gianluigi Zito1

1National Research Council ISASI, Via Pietro Castellino, Naples, 80131, Italy; 2National Research Council IBBC, Via Pietro Castellino, Naples, 80131, Italy; 3Molecular Foundry, Lawrence National Laboratory of Berkeley, Berkeley, CA 94720, USA

An advanced hyperspectral sensing imaging taking advantage of engineered all-dielectric platforms supporting bound states in the continuum (BIC) here is discussed. This approach combines surface-enhanced fluorescence and refractometric sensing both based on high-Q resonances in proximity of BICs.To demonstrate the real implementation of the proposed BIC-enhanced imaging as a platform for biosensing, hyperspectral maps of prostate cancer cells are experimentally reconstructed.



12:15 - 12:45
Invited
ID: 128 / TOM9 S09: 4
TOM 9 Optics at Nanoscale (ONS)

Plasmonic modes in cylindrical nanoparticles

Guillaume Weick

Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, France

An intensively studied quasiparticle in plasmonics is the localized surface plasmon, a collective oscillation of conduction electrons in metallic nanoparticles. Exploring how its resonance frequency changes depending on the nanoparticle geometry is a fundamental task of the field. Inspired by recent groundbreaking experiments, we derive, using a continuum mechanics model borrowed from nuclear physics, analytical expressions for the dipolar plasmon resonances in cylindrical nanoparticles. Importantly, our analytic theory is valid for any aspect ratio of the cylinder, and as such is of relevance for a wide range of experiments.

 
16:00 - 17:30TOM9 S10: Optics at Nanoscale (ONS): Physical properties II
Location: Aula 8
Session Chair: Vito Mocella, CNR, Italy
 
16:00 - 16:30
Invited
ID: 460 / TOM9 S10: 1
TOM 9 Optics at Nanoscale (ONS)

Experimenting with optical plasticity in photonic machine learning - towards all-optical Artificial Intelligence

Eugenio Fazio, Alessandro Bile, Hamed Tari

Sapienza Università di Roma, Italy

Soliton X-junctions are used as photonic neurons to perform both supervised and unsupervised learning. Networks of soliton interconnections connected together by simple X-junctions behave as AI self-organizing maps, learn complex information, store it and recognise unknown information by comparison. We will also show that solitonic interconnections can also replace the plastic element of reasoning and memory for extremely compact systems to process information transported, for example, in the form of SPP (surface-plasmon-polariton) signals. The advantage is the possibility of creating hybrid electronic-photonic circuits.



16:30 - 16:45
ID: 139 / TOM9 S10: 2
TOM 9 Optics at Nanoscale (ONS)

Directional scattering by dielectric core-semishell nanoparticles

T.P.S. Kotte, A.J.L. Adam, H.P. Urbach

Delft University of Technology, the Netherlands

Directional scattering by dielectric core-semishell nanoparticles is simulated using FEM software. The directionality of the scattering arises from the phase difference caused by the different materials which the nanoparticle is composed of. Conventionally, this phase difference is achieved by the use of metals. By choosing a medium with the refractive index between the core and semishell material, a pi phase difference is introduced causing directional scattering by the nanoparticle. This means that dielectric materials can be used, such that absorption by the nanoparticle is minimized.



16:45 - 17:00
ID: 340 / TOM9 S10: 3
TOM 9 Optics at Nanoscale (ONS)

Thermally reconfigurable dielectric metalens

Anna Archetti1,2, Ren-Jie Lin1, Ted V. Tsoulos1, Fatemeh Kiani1, Nathanael Restori1, Giulia Tagliabue1

1Laboratory of Nanoscience for Energy Technologies (LNET), STI, EPFL, Switzerland; 2Department of Biomedical Sciences, Neuroscience, UNIPD, Italy

In this work, we report the design of an ultrathin (300 nm thick) and thermo-optically reconfigurable silicon metalens operating in the visible regime (632 nm). Importantly, in our design, we rely on the thermo-optical effects to demonstrate that it is possible to achieve continuous variation of the focal-length at a fixed wavelength overcoming the need for a spatially-varying modulation input and potentially enabling an all-optical photo-thermal modulation. Our metalens exhibits a linear focal shift from 165 μm at 20°C to 135 μm at 260°C.



17:00 - 17:15
ID: 480 / TOM9 S10: 4
TOM 9 Optics at Nanoscale (ONS)

Photogating graphene/2D-semiconductors devices

Hongyu Tang, Tarique Anwar, Giulia Tagliabue

Laboratory of Nanoscience for Energy Technologies (LNET), STI, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland

In this work, we will compare the photogating performances of phototransistors based on pure graphene and graphene/2D-semiconductor. In particular, MoS2 and WSe2 will be used as n- and p- type semiconductors respectively. Our goal is to analyse the performance and mechanism of the photogating graphene-based devices, and explore nanophotonic engineering strategies to enhance their photoresponse.

 
Date: Friday, 17/Sept/2021
8:15 - 9:45TOM4 S01: Bio-Medical Optics
Location: Aula 8
Session Chair: Julia Walther, TU Dresden, Faculty of Medicine, Germany
 
8:15 - 8:45
Invited
ID: 499 / TOM4 S01: 1
TOM 4 Bio-Medical Optics

Going from an idea to an international clinical-trial and beyond: near-infrared diffuse optics to evaluate microvascular health in COVID-19 patients

Turgut Durduran, On behalf of HEMOCOVID-19 & VASCOVID consortia

ICFO-The Institute of Photonic Sciences, Spain

Endothelial dysfunction (ED) plays an important role in COVID-19 but ED cannot be evaluated at the intensive care unit (ICU). HEMOCOVID-19 (13 partners, 6 countries) consortium developed a protocol using near-infrarede spectroscopy and vascular-occlusion-test to evaluate ED. I will present the first batch of results demonstrating that ED is present in COVID-19 patients and is associated with the disease severity. I will then put this in the context of a new Horizon 2020 project, VASCOVID, where a dedicated, advanced platform is being built to ensure the clinical translation of these methods.



8:45 - 9:15
Invited
ID: 563 / TOM4 S01: 2
TOM 4 Bio-Medical Optics

High-speed, high-throughput two-photon microscopy

Sebastian Karpf

University of Lübeck, Germany

Two-Photon Microscopy offers high-resolution, low photobleaching and deep tissue penetration for intravital Imaging. Although inherently a non-linear 3D Imaging technique, beam scanners typically limit the acquisition speeds to allow only 2D imaging for dynamic scenes. Here I present SLIDE, a new technique for high speed Two-Photon Microscopy at >1000 frames/s, employing spectro-temporal scanning for up to MHz inertia-free line-scan rates. This allows in vivo 3D imaging at typical 2D imaging speeds (video-rate 3D imaging) or high-throughput Imaging flow cytometry of cells suspended in whole blood at >1000 cells/s.



9:15 - 9:30
ID: 447 / TOM4 S01: 3
TOM 4 Bio-Medical Optics

Compact Instant Pathology Microscope using second and third harmonic signals for contrast on unstained biopsy samples.

Laura M.G. van Huizen1, Frank van Mourik2, Marloes Groot1

1Vrije Universiteit van Amsterdam; 2Flash Pathlogy bv Amsterdam

We demonstrate the use of a compact mobile microscope for fast/instant pathology during intra-operative procedures. By using harmonic-signals generated by femtosecond near-IR pulses, pathology quality microscope images are obtained without any preparation of biopsy samples.



9:30 - 9:45
ID: 138 / TOM4 S01: 4
TOM 4 Bio-Medical Optics

Polarization resolved second harmonic generation imaging through a multimode fiber micro-endoscope.

Angel Sergio Cifuentes1, Johanna Trägårdh1, Tomáš Pikálek1, Petra Ondráčková1, Rodrigo Amezcua-Correa2, José Enrique Antonio-Lopez2, Tomáš Čižmár1,3

1Institute of Scientific Instruments of the CAS; 2CREOL, The College of Optics and Photonics, University of Central Florida; 3Leibniz Institute of Photonic Technology

Micro-endoscopes based on multimode fibers (MMF) have shown great potential for minimally invasive imaging deep within tissue [1]. Here, we show excitation polarization resolved second harmonic generation imaging (SHGIM) through a MMF. This permits the label-free identification of non-centrosymmetric structural proteins, e.g. myosin and collagen, and imaging is demonstrated in mouse tail tendon and cardiac tissue.

 
11:15 - 12:45TOM4 S02: Bio-Medical Optics
Location: Aula 8
Session Chair: Sebastian Karpf, University of Lübeck, Germany
 
11:15 - 11:45
Invited
ID: 259 / TOM4 S02: 1
TOM 4 Bio-Medical Optics

Imaging lipids in atherosclerosis – towards clinical photoacoustics

Gijs Van Soest1, Antonio Lopez Marin1, Verya Daeichin2, Sophinese Iskander-Rizk3, Nuria Slijkhuis1, Mirjam Visscher1, Ton van der Steen1,4

1Erasmus MC University Medical Ctr Rotterdam, Dept. of Cardiology, Netherlands, The; 2Kaminari Medical BV, The Netherlands; 3Delft University of Technology, 3mE, Dept. of Precision and Microsystems Engineering, Delft, The Netherlands; 4Delft University of Technology, Faculty of Applied Sciences, Dept. of Imaging Physics, Delft, The Netherlands

Atherosclerosis is a lipid-driven inflammatory disease of the arteries that is the most common precursor to myocardial infarctions and a major contributor to stroke. Staging and risk assessment based on plaque morphology has suboptimal predictive ability. We aim to create better diagnostic and interventional imaging modalities, by imaging lipids in the artery wall with photoacoustic imaging. We relate images and spectroscopic signatures to the (molecular) lipid distribution. In this talk I will review our findings and outline the developments towards practical application of photoacoustics for clinical imaging in cardiovascular medicine.



11:45 - 12:00
ID: 406 / TOM4 S02: 2
TOM 4 Bio-Medical Optics

Polarization-sensitive OCT using a fiber-scanning common-path probe

Jonas Golde1, Julia Walther1,2, Jiawen Li3,4, Robert A. McLaughlin3,4, Edmund Koch1,2

1TU Dresden, Carl Gustav Carus Faculty of Medicine, Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring, 01307 Dresden, Germany; 2TU Dresden, Carl Gustav Carus Faculty of Medicine, Department of Medical Physics and Biomedical Engineering, 01307 Dresden, Germany; 3Australian Research Council Centre of Excellence for Nanoscale BioPhotonics, Adelaide Medical School, The University of Adelaide, Adelaide, SA, 5005, Australia; 4Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, SA, 5005, Australia

Depth-resolved retardation measurements with a single-mode fiber-based common-path probe by using polarization-sensitive optical coherence tomography are presented, utilizing the constrained polarization evolution and the mirror state phenomenon for reconstruction of the round-trip measurements.



12:00 - 12:15
ID: 356 / TOM4 S02: 3
TOM 4 Bio-Medical Optics

Determining the collagen layer thickness of the human tympanic membrane using PSOCT

Svea Steuer1, Jonas Golde1, Steffen Ossmann2, Roberta Galli1, Lars Kirsten1, Matthias Bornitz2, Marcus Neudert2, Edmund Koch1

1Clinical Sensoring and Monitoring, Anesthesiology and Intensive Care Medicine, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany; 2Otorhinolaryngology, Carl Gustav Carus Faculty of Medicine, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany

Normal hearing ability depends on the acoustic and mechanical properties of the tympanic membrane’s collagen layer, which is surrounded by epidermal tissue. Polarization-sensitive optical coherence tomography, a non-invasive, depth-resolving technique, utilizes tissue birefringence, e.g. of collagen fibers, as an additional imaging contrast. The tympanic membrane‘s collagen layer is accessed in 3D measurements, thereby. Calculating an estimated layer thickness distribution and comparing this to results from multiphoton microscopy based on second harmonic generation, an increased thickness in adjacent regions of the malleus and annulus is determined.



12:15 - 12:30
ID: 272 / TOM4 S02: 4
TOM 4 Bio-Medical Optics

Hyperspectral Imaging based classification of occlusal stains and carious lesions

Florian Tetschke1,2, Robin Vosahlo2, Jonas Golde1, Julia Walther1,3, Christian Hannig2, Edmund Koch1

1Technische Universität Dresden, Faculty of Medicine Carl Gustav Carus, Anesthesiology and Intensive Care Medicine, Clinical Sensoring and Monitoring, Dresden, Germany; 2Technische Universität Dresden, Faculty of Medicine Carl Gustav Carus, Policlinic of Operative and Pediatric Dentistry, Dresden, Germany; 3Technische Universität Dresden, Faculty of Medicine Carl Gustav Carus, Department of Medical Physics and Biomedical Engineering, Dresden, Germany

New diagnostic techniques are required to distinguish between stains and stained incipient lesions to enable early noninvasive treatment. This in-vitro study evaluates the performance of hyperspectral imaging (HSI) based classification for occlusal lesion detection and differentiation from stains. HSI of human teeth were analyzed by classification algorithms and validated by polarized light microscopy (PLM). A kNN algorithm yielded a strong relationship of a Matthews Correlation Coefficient of 0.77. HSI based classification of occlusal stains is highly promising as a complementary method to visuo-radiographic examination for early occlusal lesion detection.



12:30 - 12:45
ID: 415 / TOM4 S02: 5
TOM 4 Bio-Medical Optics

Molecular beacon probes for sensing and silencing survivin mRNA in cell

Ambra Giannetti1, Barbara Adinolfi1, Francesco Baldini1, Mario Pellegrino2, Giovanna Sotgiu3, Sara Tombelli1, Cosimo Trono1, Greta Varchi3

1Institute of Applied Physics "N. Carrara”, CNR, 50019 Sesto Fiorentino (FI), Italy; 2Dep. of Translat. Research and New Technol. in Medicine and Surgery, University of Pisa, 56126 Pisa, Italy; 3Institute for the Organic Synthesis and Photoreactivity, CNR, 40129 Bologna, Italy

The use of antisense oligonucleotide molecular beacons, able to generate a fluorescent signal when they hybridize with their mRNA targets, allows to conjugate the ability of sensing specific mRNA with the pharmacological silencing activity, preventing the overexpression of proteins often associated to cancer development. In this context, polymethylmethacrylate nanoparticles have been used as vehicle of an oligonucleotide molecular beacon targeting survivin mRNA in A549 human lung adenocarcinoma epithelial cells in comparison with an appropriate healthy control in in-vitro experiments.

 

 
Contact and Legal Notice · Contact Address:
Privacy Statement · Conference: EOSAM 2021
Conference Software - ConfTool Pro 2.6.144+TC+CC
© 2001–2022 by Dr. H. Weinreich, Hamburg, Germany