A Compact Topological Microwave Isolator

Cerjan, Alexander Witte [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center for Integrated Nanotechnologies] (ORCID:0000000243627300)

doi:10.1038/s41566-025-01761-7

DOE OSTI · 2999159

A Compact Topological Microwave Isolator

Cerjan, Alexander Witte [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center for Integrated Nanotechnologies] (ORCID:0000000243627300)

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Abstract

A central goal of topological photonics has been to develop compact isolators using protected, non-reciprocal edge states. Furthermore, a recent demonstration of a ferrite-based microwave isolator leverages the magnon-induced topological photonic bandgap to achieve over 100 dB of isolation in a device smaller than a single free-space wavelength.

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Magneto-optics Optical materials and structures Optics and photonics Photonic crystals

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Cerjan, Alexander Witte [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center for Integrated Nanotechnologies] (ORCID:0000000243627300). 2025-10-03. A Compact Topological Microwave Isolator. https://doi.org/10.1038/s41566-025-01761-7

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