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Title: Nonreciprocal Thermal Emitters Using Metasurfaces with Multiple Diffraction Channels

Abstract

The emissivity and absorptivity of nonreciprocal thermal emitters are not constrained by the well-known Kirchhoff law of thermal radiation, which usually serves as the theoretical basis to characterize thermal properties. When thermal emitters are nondiffracting, which is the case in previous studies of nonreciprocal thermal emitters, the angular distribution of emissivity and absorptivity is mirror symmetric with respect to the normal direction, and the nonreciprocal effect is confined to a relatively narrow angular range. In this work, we consider nonreciprocal thermal emitters that can simultaneously couple to multiple diffraction channels. We show that the symmetry relation between absorptivity and emissivity can be broken in such multichannel emitters. The angular range in which the nonreciprocal effect is strong can also be significantly broadened. Such multichannel emitters can operate as one-way energy splitters. Our work significantly broadens the flexibility of thermal-radiation control in nonreciprocal thermal-emitter design.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [2];  [2];  [3];  [2]
  1. Stanford Univ., CA (United States); Univ. of Houston, TX (United States)
  2. Stanford Univ., CA (United States)
  3. Univ. of Wisconsin, Madison, WI (United States)
Publication Date:
Research Org.:
Stanford Univ., CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC); Defense Advanced Research Projects Agency (DARPA)
OSTI Identifier:
1979639
Grant/Contract Number:  
SC0019140; HR00111820046
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Applied
Additional Journal Information:
Journal Volume: 16; Journal Issue: 6; Journal ID: ISSN 2331-7019
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; Physics; metamaterials; optical & microwave phenomena; photonics; thermal properties

Citation Formats

Zhao, Bo, Wang, Jiahui, Zhao, Zhexin, Guo, Cheng, Yu, Zongfu, and Fan, Shanhui. Nonreciprocal Thermal Emitters Using Metasurfaces with Multiple Diffraction Channels. United States: N. p., 2021. Web. doi:10.1103/physrevapplied.16.064001.
Zhao, Bo, Wang, Jiahui, Zhao, Zhexin, Guo, Cheng, Yu, Zongfu, & Fan, Shanhui. Nonreciprocal Thermal Emitters Using Metasurfaces with Multiple Diffraction Channels. United States. https://doi.org/10.1103/physrevapplied.16.064001
Zhao, Bo, Wang, Jiahui, Zhao, Zhexin, Guo, Cheng, Yu, Zongfu, and Fan, Shanhui. Wed . "Nonreciprocal Thermal Emitters Using Metasurfaces with Multiple Diffraction Channels". United States. https://doi.org/10.1103/physrevapplied.16.064001. https://www.osti.gov/servlets/purl/1979639.
@article{osti_1979639,
title = {Nonreciprocal Thermal Emitters Using Metasurfaces with Multiple Diffraction Channels},
author = {Zhao, Bo and Wang, Jiahui and Zhao, Zhexin and Guo, Cheng and Yu, Zongfu and Fan, Shanhui},
abstractNote = {The emissivity and absorptivity of nonreciprocal thermal emitters are not constrained by the well-known Kirchhoff law of thermal radiation, which usually serves as the theoretical basis to characterize thermal properties. When thermal emitters are nondiffracting, which is the case in previous studies of nonreciprocal thermal emitters, the angular distribution of emissivity and absorptivity is mirror symmetric with respect to the normal direction, and the nonreciprocal effect is confined to a relatively narrow angular range. In this work, we consider nonreciprocal thermal emitters that can simultaneously couple to multiple diffraction channels. We show that the symmetry relation between absorptivity and emissivity can be broken in such multichannel emitters. The angular range in which the nonreciprocal effect is strong can also be significantly broadened. Such multichannel emitters can operate as one-way energy splitters. Our work significantly broadens the flexibility of thermal-radiation control in nonreciprocal thermal-emitter design.},
doi = {10.1103/physrevapplied.16.064001},
journal = {Physical Review Applied},
number = 6,
volume = 16,
place = {United States},
year = {Wed Dec 01 00:00:00 EST 2021},
month = {Wed Dec 01 00:00:00 EST 2021}
}

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