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Maximum Willis Coupling in Acoustic Scatterers
Li Quan, Younes Ra'di, Dimitrios Sounas +1
Willis coupling in acoustic materials defines the cross-coupling between strain and velocity, analogous to bianisotropic phenomena in electromagnetics. While these effects have bee…
Coherently Enhanced Wireless Power Transfer
Alex Krasnok, Denis G. Baranov, Andrey Generalov +2
Extraction of electromagnetic energy by an antenna from impinging external radiation is at the basis of wireless communications and power transfer (WPT). The maximum of transferred…
Boundary Effects of Weak Nonlocality in Multilayered Dielectric Metamaterials
Giuseppe Castaldi, Andrea Alù, Vincenzo Galdi
Nonlocal (spatial-dispersion) effects in multilayered metamaterials composed of periodic stacks of alternating, deeply subwavelength dielectric layers are known to be negligibly we…
Parametric amplification and bidirectional invisibility in PT-symmetric time-Floquet systems
Theodoros T. Koutserimpas, Andrea Alu, Romain Fleury
Parity-Time (PT) symmetric wave devices, which exploit balanced interactions between material gain and loss, exhibit extraordinary properties, including lasing and flux-conserving…
Spectroscopy and Biosensing with Optically Resonant Dielectric Nanostructures
Alex Krasnok, Martin Caldarola, Nicolas Bonod +1
Resonant dielectric nanoparticles (RDNs) made of materials with large positive dielectric permittivity, such as Si, GaP, GaAs, have become a powerful platform for modern light scie…
Tunable Resonance Coupling in Single Si Nanoparticle-Monolayer WS2 Structures
Sergey Lepeshov, Mingsong Wang, Alex Krasnok +8
Two-dimensional semiconducting transition metal dichalcogenides (TMDCs) are extremely attractive materials for optoelectronic applications in the visible and near-IR range. Here, w…
Coherent Virtual Absorption Based on Complex Zero Excitation for Ideal Light Capturing
Denis G Baranov, Alex Krasnok, Andrea Alù
Absorption of light is directly associated with dissipative processes in a material. In suitably tailored resonators, a specific level of dissipation can support coherent perfect a…
Enhancement of inherent Raman scattering in dielectric nanostructures with electric and magnetic Mie resonances
Kristina Frizyuk, Mehedi Hasan, Alex Krasnok +2
Resonantly enhanced Raman scattering in dielectric nanostructures has been recently proven to be an effcient tool for developing nanothermometry and experimental determination of t…
Manipulation and steering of hyperbolic surface polaritons in hexagonal boron nitride
S. Dai, M. Tymchenko, Y. Yang +8
Hexagonal boron nitride (hBN) is a natural hyperbolic material that supports both volume-confined hyperbolic polaritons (HPs) and sidewall-confined hyperbolic surface polaritons (H…
Pseudo-Linear Time-Invariant Magnetless Circulators Based on Differential Spatiotemporal Modulation of Resonant Junctions
Ahmed Kord, Dimitrios L. Sounas, Andrea Alù
In this paper, we present voltage- and current-mode differential magnetless non-reciprocal devices obtained by pairing two single-ended (SE) circulators, each consisting of three f…
Magnetless Circulators Based on Spatiotemporal Modulation of Bandstop Filters in a Delta Topology
Ahmed Kord, Dimitrios L. Sounas, Andrea Alù
In this paper, we discuss the design rationale and guidelines to build magnet-less circulators based on spatio-temporal modulation of resonant junctions consisting of first-order b…
Optical circulation in a multimode optomechanical resonator
Freek Ruesink, John P. Mathew, Mohammad-Ali Miri +2
Optical circulators are important components of modern day communication technology. With their ability to route photons directionally, these nonreciprocal elements provide useful…
Spin and valley polarized one-way Klein tunneling in photonic topological insulators
Xiang Ni, David Purtseladze, Daria A. Smirnova +3
Advances of condensed matter physics in exploiting the spin degree of freedom of electrons led to the emergence of the field of spintronics, which envisions new and more efficient…
Nonlinear Metasurfaces: A Paradigm Shift in Nonlinear Optics
Alexander Krasnok, Mykhailo Tymchenko, Andrea Alu
Frequency conversion processes, such as second- and third-harmonic generation, are one of the most common effects in nonlinear optics which offer many opportunities for photonics,…
Boosting the Terahertz Photoconductive Antenna Performance with Optimized Plasmonic Nanostructures
Sergey Lepeshov, Andrei Gorodetsky, Alexander Krasnok +5
Advanced nanophotonics penetrates into other areas of science and technology, ranging from applied physics to biology and resulting in many fascinating cross-disciplinary applicati…
Coherent perfect absorbers: linear control of light with light
Denis G. Baranov, Alex Krasnok, Timur Shegai +2
Absorption of electromagnetic energy by a material is a phenomenon that underlies many applied problems, including molecular sensing, photocurrent generation and photodetection. Co…
Near-field imaging of spin-locked edge states in all-dielectric topological metasurfaces
A. Slobozhanyuk, A. V. Shchelokova, X. Ni +6
A new class of phenomena stemming from topological states of quantum matter has recently found a variety of analogies in classical systems. Spin-locking and one-way propagation hav…
Controlling scattering of light through topological transitions in all-dielectric metasurfaces
Maxim A. Gorlach, Xiang Ni, Daria A. Smirnova +6
Topological phase transitions in condensed matter systems have shown extremely rich physics, unveiling such exotic states of matter as topological insulators, superconductors and s…
Meta-Gratings: Beyond the Limits of Graded Metasurfaces for Wavefront Control
Younes Ra'di, Dimitrios L. Sounas, Andrea Alu
Graded metasurfaces exploit the local momentum imparted by an impedance gradient to transform the impinging wavefront. This approach suffers from fundamental limits on the overall…
On-Site Wireless Power Generation
Y. Ra'di, B. Chowkwale, C. A. Valagiannopoulos +4
Conventional wireless power transfer systems consist of a microwave power generator and a microwave power receiver separated by some distance. To realize efficient power transfer,…
Static non-reciprocity in mechanical metamaterials
Corentin Coulais, Dimitrios Sounas, Andrea Alù
Reciprocity is a fundamental principle governing various physical systems, which ensures that the transfer function between any two points in space is identical, regardless of geom…
A Surface Admittance Equivalence Principle for Non-Radiating and Cloaking Problems
Giuseppe Labate, Andrea Alù, Ladislau Matekovits
In this paper, we address non-radiating and cloaking problems exploiting the surface equivalence principle, by imposing at any arbitrary boundary the control of the admittance disc…
All-optical switching and unidirectional plasmon launching with electron-hole plasma driven silicon nanoantennas
Sergey V. Li, Alexander E. Krasnok, Sergey Lepeshov +3
High-index dielectric nanoparticles have become a powerful platform for modern light science, enabling various fascinating applications, especially in nonlinear nanophotonics for w…
Optomechanically-induced spontaneous symmetry breaking
Mohammad-Ali Miri, Ewold Verhagen, Andrea Alu
We explore the dynamics of spontaneous breakdown of mirror symmetry in a pair of identical optomechanical cavities symmetrically coupled to a waveguide. Large optical intensities e…