Near-complete violation of Kirchhoff's law of thermal radiation with a 0.3  T magnetic field

The capability to overcome Kirchhoff's law of thermal radiation provides new opportunities in energy harvesting and thermal radiation control. Previously, design towards demonstrating such capability requires a magnetic field of 3 T, which is difficult to achieve in practice. In this work, we p...

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Veröffentlicht in:Optics letters 2019-09, Vol.44 (17), p.4203-4206
Hauptverfasser: Zhao, Bo, Shi, Yu, Wang, Jiahui, Zhao, Zhexin, Zhao, Nathan, Fan, Shanhui
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Sprache:eng
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Zusammenfassung:The capability to overcome Kirchhoff's law of thermal radiation provides new opportunities in energy harvesting and thermal radiation control. Previously, design towards demonstrating such capability requires a magnetic field of 3 T, which is difficult to achieve in practice. In this work, we propose a nanophotonic design that can achieve such capability with a far more modest magnetic field of 0.3 Tesla, a level that can be achieved with permanent magnets. Our design uses guided resonance in low-loss dielectric gratings sitting on a magneto-optical material, which provides significant enhancement on the sensitivity to the external magnetic field.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.44.004203