Inverse-design of non-Hermitian potentials for light management

Muriel Botey, Waqas Waseem Ahmed, Ramon Herrero, Ying Wu, Kestutis Staliunas

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, we propose a general inverse-design strategy based on genetic algorithm optimization to achieve ‘on demand’ manipulation of light in one-dimensional (1D) and two-dimensional (2D) non-Hermitian systems. The optimization process faithfully creates non-Hermitian potentials from any given arbitrary real (or imaginary) permittivity distribution for the desired frequency selective and broadband asymmetric response in 1D multilayer structures. As a demonstration in 2D, we design periodic and aperiodic complex permittivity spatial distributions to create "sink-type" concentrators of light around a desired area. The proposed inverse-design approach to generate non-Hermitian potentials represents an alternative to the Hilbert Transform (HT) generalizing the Kramers Kronig relations in space, additionally being selective in spectrum.
Original languageEnglish (US)
Title of host publicationMetamaterials XIII
PublisherSPIE
ISBN (Print)9781510651364
DOIs
StatePublished - May 24 2022

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