Extreme enhancement of nonreciprocal wave propagation in magneto-optical metamaterials

Tyboroski, M., Macedo, R. and Camley, R. E. (2023) Extreme enhancement of nonreciprocal wave propagation in magneto-optical metamaterials. Physical Review Materials, 7(12), 125201. (doi: 10.1103/PhysRevMaterials.7.125201)

Abstract

We investigate the magnetic field-induced spectral properties of metamaterials incorporating indium antimonide (InSb), using electromagnetic probes in the low terahertz (THz) frequency regime. An effective medium theory has been developed to explore the behavior of InSb interspersed with a simple dielectric in a grating-like structure with various thicknesses and grating filling factors. The metamaterial grating structure impacts the light-matter interactions and substantially modifies reflectivity. Our numerical results demonstrate how nonreciprocal reflection can be enhanced and controlled in this spectral region through the composition of the magnetic grating. The current need for higher frequency communication technology drives the relevancy of this study for application to directional-dependent THz devices.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Macedo, Dr Rair
• Authors: Tyboroski, M., Macedo, R., and Camley, R. E.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: Physical Review Materials
• Publisher: American Physical Society
• ISSN: 2475-9953
• ISSN (Online): 2475-9953
• Published Online: 20 December 2023
• Copyright Holders: Copyright © 2023 The Authors
• First Published: First published in Physical Review Materials 7(12):125201
• Publisher Policy: Reproduced under a Creative Commons licence