Control over emissivity of zero-static-power thermal emitters based on phase-changing material GST

Light, Science & Applications
Kaikai DuMin Qiu

Abstract

Controlling the emissivity of a thermal emitter has attracted growing interest, with a view toward a new generation of thermal emission devices. To date, all demonstrations have involved using sustained external electric or thermal consumption to maintain a desired emissivity. In the present study, we demonstrated control over the emissivity of a thermal emitter consisting of a film of phase-changing material Ge2Sb2Te5 (GST) on top of a metal film. This thermal emitter achieves broad wavelength-selective spectral emissivity in the mid-infrared. The peak emissivity approaches the ideal blackbody maximum, and a maximum extinction ratio of >10 dB is attainable by switching the GST between the crystalline and amorphous phases. By controlling the intermediate phases, the emissivity can be continuously tuned. This switchable, tunable, wavelength-selective and thermally stable thermal emitter will pave the way toward the ultimate control of thermal emissivity in the field of fundamental science as well as for energy harvesting and thermal control applications, including thermophotovoltaics, light sources, infrared imaging and radiative coolers.

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Citations

May 28, 2019·Nature Materials·Denis G BaranovMikhail A Kats
Apr 4, 2018·Optics Express·Hong-Feng WangYi-Ping Zhao
Jun 26, 2018·Advanced Materials·Zengguang ChengHarish Bhaskaran
Sep 7, 2018·Optics Express·Masashi OnoShanhui Fan
Jan 25, 2019·Nature Communications·Jingyi TianSergey I Bozhevolnyi
Mar 7, 2019·Light, Science & Applications·Yurui QuMin Qiu
Jun 25, 2019·Light, Science & Applications·Yuzhe XiaoMikhail A Kats
Nov 2, 2019·Applied Optics·Yingli HaXiangang Luo
Apr 28, 2020·Light, Science & Applications·Huanzheng ZhuMin Qiu
Aug 7, 2019·Scientific Reports·Heungsoo KimNicholas A Charipar
Apr 1, 2020·Optics Express·Chaobiao ZhouJiangtao Liu
Feb 2, 2021·Science Advances·Zengguang ChengHarish Bhaskaran
Jan 28, 2021·Nanomaterials·Qianlong KangZhongyi Guo
Feb 25, 2021·Advanced Materials·Jiajia YangQuan Li
Feb 24, 2021·Nature Communications·Mikhail Y ShalaginovTian Gu
Mar 18, 2021·Optics Express·Dong-Qin ZhangHong-Wei Wu
Apr 15, 2021·Light, Science & Applications·Huanzheng ZhuMin Qiu
Jun 18, 2021·Light, Science & Applications·Da-Quan YangYun-Feng Xiao
Jul 31, 2021·Optics Letters·Igor A Nechepurenko, Denis G Baranov

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Methods Mentioned

BETA
light scattering

Software Mentioned

COMSOL Multiphysics

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