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Radiative thermal switch driven by anisotropic black phosphorus plasmons

Authors :
Yong Zhang
Jia-Dong Shen
Ya-Tao Ren
Yi-Jun Zhao
Hong Qi
Mingjian He
Mauro Antezza
School of Civil Engineering [Harbin] (HIT)
Harbin Institute of Technology (HIT)
Laboratoire Charles Coulomb (L2C)
Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)
Théorie du rayonnement matière et phénomènes quantiques
Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)
Source :
Optics Express, Optics Express, Optical Society of America-OSA Publishing, 2020, 28, pp.26922. ⟨10.1364/OE.402642⟩
Publication Year :
2020
Publisher :
Optica Publishing Group, 2020.

Abstract

Black phosphorus (BP), as a two-dimensional material, has exhibited unique optoelectronic properties due to its anisotropic plasmons. In the present work, we theoretically propose a radiative thermal switch (RTS) composed of BP gratings in the context of near-field radiative heat transfer. The simply mechanical rotation between the gratings enables considerable modulation of radiative heat flux, especially when combined with the use of non-identical parameters, i.e., filling factors and electron densities of BP. Among all the cases including asymmetric BP gratings, symmetric BP gratings, and BP films, we find that the asymmetric BP gratings possess the most excellent switching performance. The optimized switching factors can be as high as 90% with the vacuum separation d=50 nm and higher than 70% even in the far-field regime d=1 µm. The high-performance switching is basically attributed to the rotatable-tunable anisotropic BP plasmons between the asymmetric gratings. Moreover, due to the twisting principle, the RTS can work at a wide range of temperature, which has great advantage over the phase change materials-based RTS. The proposed switching scheme has great significance for the applications in optoelectronic devices and thermal circuits.

Details

ISSN :
10944087
Volume :
28
Database :
OpenAIRE
Journal :
Optics Express
Accession number :
edsair.doi.dedup.....8a1c98fe8d19d799d9452a0fa07ced4b
Full Text :
https://doi.org/10.1364/oe.402642