Time-varying media, dispersion, and the principle of causality

TT Koutserimpas, F Monticone - Optical Materials Express, 2024 - opg.optica.org
The article reviews general properties of time-varying dispersive materials. We first briefly
discuss different dispersion models that have been proposed in the literature, the role of the …

[HTML][HTML] Roadmap on photonic metasurfaces

SA Schulz, R Oulton, M Kenney, A Alù, I Staude… - Applied Physics …, 2024 - pubs.aip.org
Here we present a roadmap on Photonic metasurfaces. This document consists of a number
of perspective articles on different applications, challenge areas or technologies underlying …

Two-step homogenization of spatiotemporal metasurfaces using an eigenmode-based approach

P Garg, AG Lamprianidis, S Rahman… - Optical Materials …, 2024 - opg.optica.org
Metamaterials are a fascinating class of photonic materials since they allow us to control
optical responses (largely) at will. Besides being an intellectual challenge, adding time …

Wavelength-independent Bragg-like reflection in uniaxial bi-anisotropic media

SF Koufidis, MW McCall - JOSA B, 2023 - opg.optica.org
We have recently shown that a uniform birefringent medium exhibits a circular Bragg
phenomenon that relies solely on resonant tuning of the medium's parameters, rather than …

Dynamic polarization control by adjustable cross-polarization coupling in time-periodic anisotropic media

M Alavi, AN Askarpour - JOSA B, 2024 - opg.optica.org
We study wave propagation in an anisotropic medium whose optic axes vary periodically in
time. This variation, in addition to generating frequency products, lifts the degeneracy …

Photonic time crystals: Theory and applications

MM Asgari, P Garg, X Wang, MS Mirmoosa… - arXiv preprint arXiv …, 2024 - arxiv.org
This tutorial offers a comprehensive overview of photonic time crystals-artificial materials
whose electromagnetic properties are periodically modulated in time at scales comparable …

Time-varying equivalent circuit for dynamically modulated dielectric slabs and its implications for stability analysis

M Salehi, M Memarian, K Mehrany - Optics Express, 2024 - opg.optica.org
Equivalent circuits (ECs) have played an instrumental role in analyzing and modeling
distributed electromagnetic structures for many decades, owing to their intrinsic simplicity …

Light propagation in time-periodic bi-isotropic media

SF Koufidis, TT Koutserimpas, F Monticone… - arXiv preprint arXiv …, 2024 - arxiv.org
Photonic structures and time-crystals, wherein time is incorporated as an additional degree
of freedom for light manipulation, have necessitated the development of analytical and semi …