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
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TOM11 S08: Waves in Complex Photonic Media: Waves in complex media II
16:15 - 17:45
Session Chair: Edoardo De Tommasi, National Research Council, Italy
Location:Aula 11 1,5 Floor
16:15 - 16:45 Invited ID: 127 / TOM11 S08: 1 TOM 11 Waves in Complex Photonic Media
Localization maps and spatial decay of quasimodes in Vogel spirals photonic structures
Marcus Prado1, Fabrizio Sgrignuoli2, Yuyao Chen2, Luca Dal Negro2, Felipe Pinheiro1
1Physics Institute, Universidade Federal do Rio de Janeiro, Brazil; 2Department of Electrical and Computer Engineering, Boston University, Boston, Massachusetts, 02215, USA.
We investigate the spatial and temporal localization properties of quasimodes of two-dimensional Vogel spirals, composed of deterministic, aperiodic arrays of electric dipoles. By determining the structural entropy and localization maps of Vogel spirals using the Green’s matrix method, we show that three distinctive decay forms of quasimodes coexist in Vogel spirals: exponential, power-law, and gaussian. These decay forms are demonstrated by a no-fitting analysis of the localization maps.
16:45 - 17:15 Invited ID: 496 / TOM11 S08: 2 TOM 11 Waves in Complex Photonic Media
Photonic 2D quantum walks in anisotropic structured media
Universita' di Napoli Federico II, Italy
Although simulated in a variety of platforms, genuine two-dimensional realizations of quantum walks remain challenging. I will present an innovative approach to the photonic simulation of quantum walks in two dimensions, where the walker positions are encoded in the transverse-wavevector component of a single light beam. The desired dynamics is obtained by means of a regular sequence of anisotropic patterned liquid-crystal devices, which apply polarization-dependent transverse “kicks” to the photons in the beam. As an example, we engineer our quantum walk so that it realizes a periodically driven Chern insulator.
17:15 - 17:30 ID: 428 / TOM11 S08: 3 TOM 11 Waves in Complex Photonic Media
Random laser from reconfigurable active controlled colloids
1The Blackett Laboratory, Department of Physics, Imperial College London, United Kingdom; 2Department of Chemistry, University College London, United Kingdom
We demonstrate random lasing from a colloidal suspension via active controls. Heating the suspension locally through an external laser, with assistance from the half carbon-coated silica particle, causes the titania colloids to gather and form a high-density cluster due to the Marangoni effect. By incorporating the self-propulsion motion of the half carbon-coated particle, clusters can be arranged into arbitrary shapes through the active control of the half carbon-coated particle. As a proof of concept, the construction dynamics and the characteristics of the design of a triangular-shaped random laser are presented.