Enhanced Faraday rotation by dielectric metasurfaces with Bayesian shape-optimized scatterers

Thomas Kiel*, Paris Varytis, Bettina Beverungen, Philip Trøst Kristensen, Kurt Busch

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

In this Letter, we demonstrate how to optimize the magneto–optic response of a Huygens metasurface composed of square arrays of all-dielectric nano-disk scatterers. We compare cylindrical and shape-modified disks. Both provide a strongly enhanced Faraday rotation that is accompanied by almost 100% transmittance. The shape modification obtained via a Bayesian optimization algorithm results in a 50% increase in the magneto–optic response compared to the best cylindrical disk, providing 15 of polarization rotation for a 260 nm thick metasurface.

Original languageEnglish
JournalOptics Letters
Volume46
Issue number7
Pages (from-to)1720-1723
ISSN0146-9592
DOIs
Publication statusPublished - 1 Apr 2021

Bibliographical note

Funding Information:
Funding. Deutsche Forschungsgemeinschaft (DFG), SFB 951, (Project 182087777); Bundesministerium für Bildung und Forschung (BMBF), (Project 13N14149).

Publisher Copyright:
© 2021 Optical Society of America

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