Conference Agenda

TOM5 S04: Resonant Nanophotonics
Thursday, 15/Sept/2022:
8:30am - 10:00am

Session Chair: David Hunger, Karlsruhe Institute of Technology, Germany
Location: B120

1st floor, 70 seats

8:30am - 9:00am
ID: 370 / TOM5 S04: 1
TOM 5 Resonant Nanophotonics

Bio-inspired polaritons: resonant photonics with organic matter.

Carla Estévez-Varela1, Miguel Augusto Castillo2, Martin Lopez-Garcia2, Isabel Pastoriza-Santos1, Sara Núñez-Sánchez1

1Functional NanoBioMaterials Group, CINBIO-University of Vigo, Vigo, Spain; 2Natural and Artificial Photonic Structures Group, International Iberian Nanotechnology Laboratory, Braga, Portugal

Photosynthesis is a phenomenon that has fascinated humanity from ancient times. The complexity of the natural photosynthetic structures and their molecular components makes it difficult to work out the mechanism that governs their efficiency. Under this complexity, there are structural rules with molecular spatial distributions at the nanoscale repeated between different photosynthetic life entities, such as bacteria or plants. In this seminar, I will introduce a revolutionary organic platform inspired by compact molecular distributions of photosynthetic complexes which can be exploited to transport photon energy/information through polaritonic optical excitations. I will continue explaining to you our results by applying them to self-standing polymer photonic structures inspired by photosynthetic organelles. Finally, I will show our last results simulating real photosynthetic organelles at the nanoscale which will lead us to an open question: can be natural organelles using polaritonic resonances at the nanoscale achieve these extraordinary efficiencies?

9:00am - 9:15am
ID: 124 / TOM5 S04: 2
TOM 5 Resonant Nanophotonics

Dark-field scanning Hyperspectral imaging of SiGe dewetted Mie resonator

Luca Fagiani1,2, Nicoletta Granchi3, Marco Salvalaglio5,6, Chiara Barri1,2, Andrea Ristori3, Michele Montanari3, Massimo Gurioli3, Marco Abbarchi4, Axel Voigt5,6, Francesca Intonti3, Maria Antonietta Vincenti7, Monica Bollani2

1Department of Physics, Politecnico di Milano, Milano, Italy; 2Institute of Photonic and Nanotechnology - Consiglio Nazionale delle Ricerche, LNESS laboratory, Como, Italy; 3LENS and Department of Physics and Astronomy, University of Florence, Sesto Fiorentino, Italy; 4Aix Marseille Univ, Université de Toulon, CNRS, IM2NP Marseille, France; 5Institute of Scientific Computing, TU Dresden, Dresden, Germany; 6Dresden Centre for Computational Materials Science (DCMS), TU Dresden, Dresden, Germany; 7Department of Information Engineering, University of Brescia, Brescia, Italy

All-dielectric, sub-micrometric particles obtained through solid state dewetting support Mie resonances together with a high quality monocrystalline composition. Although the scattering properties of these systems have been qualitatively investigated, a precise study on the impact given by the effective complex morphology of a dewetted nanoparticle to the Mie scattering properties is still missing. In this work, by using morphological characterization, phase field modelling and light scattering simulation, we provide a realistic overview of the single scatterer optical properties. Dark-field Scanning Hyperspectral Imaging experiments are then performed, for the first time, allowing to map in real space the distribution of multipolar modes and to reconstruct the scattering pattern also at angles wider than the numerical aperture of conventional microscope objective lenses. We find an excellent agreement between the experimental and theoretical scattering cross-sections.

9:15am - 9:30am
ID: 252 / TOM5 S04: 3
TOM 5 Resonant Nanophotonics

Exploring subradiant optical modes in subwavelength arrays of quantum emitters

María Blanco de Paz1,2, Alejandro González-Tudela3, Paloma A. Huidobro2

1Instituto de Telecomunicações, Portugal; 2Donostia International Physics center, Spain; 3Institute of Fundamental Physics, Spain

We studied the optical response of quantum metasurfaces consisting in quantum emitters arranged as non-Bravais lattices. Reducing the symmetries of the system by tuning either the lattice or the quantum emitters we are able to access new types of light matter interactions, such as the quasi-bound states in the continuum and exotic Dirac dispersions.

9:30am - 9:45am
ID: 302 / TOM5 S04: 4
TOM 5 Resonant Nanophotonics

Figure of merit comparison between Surface Plasmon Resonance and Bloch Surface Waves

Bernardo Dias1,2, José M. M. de Almeida1,3, Luís C. C. Coelho1,2

1INESC-TEC, Portugal; 2Department of Physics and Astronomy, Faculty of Sciences, University of Porto; 3Department of Physics, School of Science and Technology, University of Trás-os-Montes e Alto Douro

The sensing performance of two types of electromagnetic surface waves are compared, a Surface Plasmon Polariton, where a gold thin film is used, being a standard material in biosensing applications; and a Bloch Surface Wave, using a photonic crystal made of a stack of silica and titanium dioxide layers. It is verified that the sensing performance (as measured by the Figure of Merit) of the gold film is higher, even though the Bloch Surface Waves can serve specific applications due to its narrow bandwidth. At the same time, it is concluded that further research must be made in order to choose the right set of parameters that maximize the Bloch Surface Wave performance.