Gradient-index nanophotonics and metamaterials

Igor I. Smolyaninov

doi:10.1117/12.2632538

3 October 2022 Gradient-index nanophotonics and metamaterials

Igor I. Smolyaninov

Proceedings Volume 12195, Metamaterials, Metadevices, and Metasystems 2022; 121950E (2022) https://doi.org/10.1117/12.2632538
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States

Abstract

It is commonly believed that electromagnetic waves cannot propagate in lossy conductive media and that they quickly decay inside such media over short length scales of the order of the so-called skin depth. Here we prove that this common belief is incorrect if the conductive medium is stratified. We demonstrate that electromagnetic waves in stratified lossy conductive media may have propagating character, and that the propagation length of such waves may be considerably larger than the skin depth. Our findings enable novel electromagnetic metamaterial designs by mediating the effect of losses on electromagnetic signal propagation in metamaterials. Our results demonstrate a new class of inherently non-Hermitian electromagnetic media with high dissipation, no gain, and no PT-symmetry, which nevertheless have almost real eigenvalue spectrum.

Conference Presentation

Citation Download Citation

Igor I. Smolyaninov "Gradient-index nanophotonics and metamaterials", Proc. SPIE 12195, Metamaterials, Metadevices, and Metasystems 2022, 121950E (3 October 2022); https://doi.org/10.1117/12.2632538

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