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Published May 6, 2022 | Submitted + Supplemental Material + Published
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Nonreciprocal infrared absorption via resonant magneto-optical coupling to InAs


Nonreciprocal elements are a vital building block of electrical and optical systems. In the infrared regime, there is a particular interest in structures that break reciprocity because their thermal absorptive (and emissive) properties should not obey the Kirchhoff thermal radiation law. In this work, we break time-reversal symmetry and reciprocity in n-type–doped magneto-optic InAs with a static magnetic field where light coupling is mediated by a guided-mode resonator structure, whose resonant frequency coincides with the epsilon-near-zero resonance of the doped indium arsenide. Using this structure, we observe the nonreciprocal absorptive behavior as a function of magnetic field and scattering angle in the infrared. Accounting for resonant and nonresonant optical scattering, we reliably model experimental results that break reciprocal absorption relations in the infrared. The ability to design these nonreciprocal absorbers opens an avenue to explore devices with unequal absorptivity and emissivity in specific channels.

Additional Information

© 2022 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). Submitted 16 September 2021; Accepted 21 March 2022; Published 6 May 2022. Y.K. used the Kavli Nanoscience Institute (KNI) at Caltech for fabrication facilities. K.J.S. would like to acknowledge H. Akbari, D. H. Drew, and A. Laucht for discussions around the design of the experiment and application of the magnetic field. This work was supported by DARPA NLM, grant no. HR00111820046 (to K.J.S., B.Z., Y.K., S.F., and H.A.A.). K.J.S. would like to thank the support by the NSF GRFP for a Graduate Research Fellowship. Author contributions: The manuscript was written through contributions of all authors. All authors have given approval to the final version of the manuscript. Measurements were done by K.J.S. Fabrication was done by Y.K. The theoretical and modeling work was led by B.Z. and supported by K.J.S. The authors declare that they have no competing interests. Data and materials availability: All data needed to evaluate the conclusions in the paper are present in the paper and/or the Supplementary Materials.

Attached Files

Published - sciadv.abm4308.pdf

Submitted - 2203.06227.pdf

Supplemental Material - sciadv.abm4308_sm.pdf


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August 20, 2023
November 16, 2023