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Planar chiral metasurfaces with maximal tunable chiroptical response driven by bound states in the continuum
Tan Shi, Zi-Lan Deng, Guangzhou Geng +8
Optical metasurfaces with high-Q chiral resonances can boost light-matter interaction for various applications of chiral response for ultrathin, active, and nonlinear metadevices.…
Photonics of Time-Varying Media
Emanuele Galiffi, Romain Tirole, Shixiong Yin +7
Time-varying media have recently emerged as a new paradigm for wave manipulation, thanks to thesynergy between the discovery of novel, highly nonlinear materials, such as epsilon-n…
Encircling exceptional points in a Riemann sphere for efficient asymmetric polarization-locked devices
Aodong Li, Lin Chen
Dynamically encircling exceptional points (EPs) in two-dimensional Hamiltonian parameter space has enabled intriguing chiral dynamics in which the final state of the system depends…
Perfect diffraction metagratings supporting bound states in the continuum and exceptional points
Zi-Lan Deng, Feng-Jun Li, Huanan Li +2
Resonance coupling in non-Hermitian systems can lead to exotic features, such as bound states in the continuum (BICs) and exceptional points (EPs), which have been widely employed…
Temporal Parity-Time Symmetry for Extreme Energy Transformations
Huanan Li, Shixiong Yin, Emanuele Galiffi +1
Temporal interfaces introduced by abrupt switching of the constitutive parameters of unbounded media enable unusual wave phenomena. So far, their explorations have been mostly limi…
On the bandwidth of singular plasmonic resonators in relation to the Chu limit
Mariano Pascale, Sander A. Mann, Carlo Forestiere +1
Plasmonic nanostructures with singular geometries can exhibit a broadband scattering response that at first glance appears to violate the lower bounds for the radiation quality (Q)…
Enhanced Meta-Displays Using Advanced Phase-Change Materials
Omid Hemmatyar, Sajjad Abdollahramezani, Ioannis Zeimpekis +12
Structural colors generated due to light scattering from static all-dielectric metasurfaces have successfully enabled high-resolution, high-saturation, and wide-gamut color printin…
Lower Bounds to the Q factor of Electrically Small Resonators through Quasistatic Modal Expansion
Mariano Pascale, Sander A. Mann, Dimitrios C. Tzarouchis +3
The problem of finding the optimal current distribution supported by small radiators yielding the minimum quality (Q) factor is a fundamental problem in electromagnetism. Q factor…
Advanced Phase-Change Materials for Enhanced Meta-Displays
Omid Hemmatyar, Sajjad Abdollahramezani, Sergey Lepeshov +4
Structural colors generated due to light scattering from static all-dielectric metasurfaces have successfully enabled high-resolution, high-saturation and wide-gamut color printing…
Temporal interfaces by instantaneously varying boundary conditions
Luca Stefanini, Shixiong Yin, Davide Ramaccia +3
Temporal metamaterials have been recently exploited as a novel platform for conceiving several electromagnetic and optical devices based on the anomalous scattering response arisin…
Electrically driven programmable phase-change meta-switch reaching 80% efficiency
Sajjad Abdollahramezani, Omid Hemmatyar, Mohammad Taghinejad +11
Despite recent advances in active metaoptics, wide dynamic range combined with high-speed reconfigurable solutions is still elusive. Phase-change materials (PCMs) offer a compellin…
Roadmap on multimode light shaping
Marco Piccardo, Vincent Ginis, Andrew Forbes +35
Our ability to generate new distributions of light has been remarkably enhanced in recent years. At the most fundamental level, these light patterns are obtained by ingeniously com…
Observation of Topologically Robust Localized Magnetic Plasmon Skyrmions
Zi-Lan Deng, Tan Shi, Alex Krasnok +2
Optical skyrmions have recently been constructed by tailoring electric or spin field distributions through the interference of multiple surface plasmon polaritons, offering promisi…
Enhanced Light-Matter Interaction in Two-Dimensional Transition Metal Dichalcogenides
Lujun Huang, Alex Krasnok, Andrea Alu +3
Two dimensional (2D) transition metal dichalcogenide (TMDC) materials, such as MoS2, WS2, MoSe2, and WSe2, have received extensive attention in the past decade due to their extraor…
Parity-Time Symmetry and Exceptional points: A Tutorial
Alex Krasnok, Nikita Nefedkin, Andrea Alu
The physics of systems that cannot be described by a Hermitian Hamiltonian, has been attracting a great deal of attention in recent years, motivated by their nontrivial responses a…
Surface-Wave Propagation on Non-Hermitian Metasurfaces with Extreme Anisotropy
Marino Coppolaro, Massimo Moccia, Giuseppe Castaldi +2
Electromagnetic metasurfaces enable the advanced control of surface-wave propagation by spatially tailoring the local surface reactance. Interestingly, tailoring the surface resist…