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!

Session Overview
TOM13 S11: Ultrafast: Ultrafast Dynamics
Wednesday, 15/Sept/2021:
16:15 - 17:45

Session Chair: Paolo Antonio Carpeggiani, TU WIEN, Austria
Location: Aula 1

1st floor

16:15 - 16:30
ID: 178 / TOM13 S11: 1
TOM 13 Ultrafast Optical Technologies and Applications

Attosecond electron motion control in solid-state

Dandan Hui1, Husain Alqattan1, Shunsuke Yamada2,3, Vladimir Pervak4, Kazuhiro Yabana2,3, Mohammed Hassan1

1University of Arizona, United States of America; 2Graduate School of Pure and Applied Sciences, University of Tsukuba, Japan.; 3Center for Computational Sciences, University of Tsukuba, Japan.; 4Ludwig-Maximilians-Universität München, Germany.

Advancements in attosecond pulse generation give access to the electron motion dynamics of matter in real-time. Here, we measured the field-induced electronic delay response of the dielectric system to be in the order of a few hundred attoseconds and increase at higher field strength. Moreover, we demonstrate the attosecond electron motion control using synthesized two-octave light waveforms. This on-demand electron motion control opens the door for establishing ultrafast optical switches and paves the way to extend the frontiers of modern electronics and data information processing technologies into the petahertz realm.

16:30 - 16:45
ID: 457 / TOM13 S11: 2
TOM 13 Ultrafast Optical Technologies and Applications

Time-resolved high harmonic spectroscopy of ultrafast solid-state dynamics in VO2

Mina R. Bionta1,2, Elissa Haddad1, Adrien Leblanc1, Vincent Gruson1,3, Philippe Lassonde1, Heide Ibrahim1, Jérémie Chaillou1, Nicolas Émond1, Martin R. Otto4, Álvaro Jiménez-Galán5, Rui E. F. Silva6, Misha Ivanov5,7,8, Bradley J. Siwick4, Mohamed Chaker1, François Légaré1

1Centre Énergie Matériaux Télécommunications, Institut national de la recherche scientifique, Varennes, Québec, Canada; 2Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA; 3Department of Physics, The Ohio State University, Columbus, Ohio, USA; 4Department of Physics and Department of Chemistry, Center for the Physics of Materials, McGill University, Montréal, Québec, Canada; 5Max-Born-Institute, Berlin, Germany; 6Departamento de Física Teórica de la Materia Condensada, Universidad Autónoma de Madrid, Madrid, Spain; 7Deparment of Physics, Humboldt University, Berlin, Germany; 8Department of Physics, Imperial College London, London, United Kingdom

High harmonic generation is particularly sensitive to band structure, making it a tool of choice to study all kind of complex dynamics in strongly correlated materials. We present a table-top all optical technique using high harmonic spectroscopy to probe the time-resolved electronic dynamics of the insulator-to-metal phase transition in vanadium dioxide. Our measurements are in good agreement with previous ultrafast electronic diffraction measurements and theoretical density functional calculations.

16:45 - 17:00
ID: 463 / TOM13 S11: 3
TOM 13 Ultrafast Optical Technologies and Applications

Tracing liquid-phase femtosecond dynamics in biomolecules and nano-solids using water-window X-ray transient absorption spectroscopy

Tadas Balciunas1,2, Yi-Ping Chang1, Zhong Yin2, Vit Svoboda2, Jean-Pierre Wolf1, Hans Jakob Wörner2

1GAP-Biophotonics, Université de Genéve, 1205 Geneva, Switzerland; 2Laboratory for Physical Chemistry, ETH Zürich, 8093 Zürich, Switzerland

We demonstrate femtosecond time–resolved soft–X–ray absorption spectroscopy of liquid samples using table-top high-order harmonic source in the water-window spectral range. The proof-of-principle measurements of dynamics in photoionized liquid alcohols, and UV-excited small heterocyclic hydrocarbons reveal the intermolecular interaction effects on the dynamics. In the time domain, our measurements resolve the gradual appearance of absorption features due to multi-photon induced dynamics in liquid alcohols at carbon K-edge, aqueous solutions at nitrogen K-edge and charge dynamics in TiO2 colloidal suspension probed at Ti L2,3-edge with a temporal resolution of ∼30 fs.

17:00 - 17:15
ID: 289 / TOM13 S11: 4
TOM 13 Ultrafast Optical Technologies and Applications

Dynamical imaging of local photovoltage at semiconductor surface by photo-assisted ultrafast scanning electron microscopy

Mohamed Zaghloul1,3, Silvia Maria Pietralunga2,3, Gabriele Irde1,3, Vittorio Sala1,3, Giulio Cerullo1, Hao Chen1,3, Giovanni Isella4, Guglielmo Lanzani1,3, Maurizio Zani1, Alberto Tagliaferri1,3

1Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci, 32, 20133 Milano, Italy; 2Institute for Photonics and Nanotechnologies (IFN)—National Research Council (CNR), Piazza L. da Vinci, 32, 20133 Milano, Italy; 3CNST@PoliMi, Istituto Italiano di Tecnologia (IIT), Via Giovanni Pascoli 70/3, Milano, Italy; 4LNESS-Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy

Photo-assisted Ultrafast Scanning Electron Microscopy (USEM) dynamically maps surface photovoltages and local electric fields in semiconducting samples. Photovoltages and their gradients close to the emission at surface affect the yield and the detection efficiency of secondary electrons (SE). In this work, we present a method to characterize the evolution of photo-excited SE 2D patterns up to ultrafast regime. These results reveal the role of surface states in affecting the external field dynamics at picoseconds. Moreover, we show that tiny changes in surface preparation express deeply different photo-excited voltage signals.

17:15 - 17:30
ID: 398 / TOM13 S11: 5
TOM 13 Ultrafast Optical Technologies and Applications

Study of the ultrafast electron-temperature dynamics in photo-excited Au nanoparticles by Transient Photoemission Spectroscopy

Maria Sygletou1, Stefania Benedetti2, Marzia Ferrera1, Gian Marco Pierantozzi3, Riccardo Cucini3, Giuseppe Della Valle4, Pietro Carrara5, Alessandro De Vita5, Alessandro di Bona2, Piero Torelli3, Daniele Catone6, Giancarlo Panaccione3, Maurizio Canepa1, Francesco Bisio7

1OptMatLab, Dipartimento di Fisica, Università di Genova, via Dodecaneso 33, I-16146 Genova, Italy; 2CNR-Istituto Nanoscienze, via Campi 213/a, 41125 Modena, Italy; 3Istituto Officina dei Materiali-CNR Laboratorio TASC, Area Science Park, S.S. 14, Km 163.5, Trieste I-34149, Italy; 4Dipartimento di Fisica, IFN-CNR, Politecnico di Milano, Piazza Leonardo da Vinci 32, I-20133 Milano, Italy; 5Dipartimento di Fisica, Università degli Studi di Milano, via Celoria 16, Milano, Italy; 6Istituto di Struttura della Materia - CNR (ISM-CNR) EuroFEL Support Laboratory (EFSL), via del Fosso del Cavaliere, 100 I-00133 Rome, Italy; 7CNR-SPIN, Istituto Superconduttori Materiali Innovativi e Dispositivi, Perrone 24, I-16152 Genova, Italy

We measured the femtosecond evolution of the electronic temperature of laser-excited gold nanoparticles, by means of ultrafast time-resolved photoemission spectroscopy induced by extreme-ultraviolet radiation pulses. The temperature of the electron gas was deduced by recording and fitting high-resolution photoemission spectra around the Fermi edge of gold nanoparticles providing a direct, unambiguous picture of the ultrafast electron-gas dynamics.

17:30 - 17:45
ID: 396 / TOM13 S11: 6
TOM 13 Ultrafast Optical Technologies and Applications

Real-time full-field characterization of ultrafast soliton fission induced by modulation instability

Francesca Gallazzi1, Shanti Toenger1, Mikko Närhi1, John M. Dudley2, Goëry Genty1

1Photonics Laboratory, Tampere University, Finland; 2institut FEMTO-ST, Université Bourgogne Franche-Comté

We present a real-time measurement technique based on Fourier Transform spectral interferometry coupled with a broadband reference pulse for the full-field characterization of broadband ultrafast complex pulses. With the proposed method we analyse noise-seeded modulation instability inducing soliton fission with a 20 fs resolution. We record the spectral interference between our test and reference pulse and retrieve complete field information using Fourier Transform Spectral interferometry pulse reconstruction. Experimental results are in good agreement with numerical simulations.