Tunable dual-band thermal emitter consisting of single-sized phase-changing GST nanodisks

Optics Express
Yurui QuQiang Li

Abstract

Thermal emission control has been attracting increased attention in both fundamental science and many applications including infrared sensing, radiative cooling and thermophotovoltaics. In this paper, a tunable dual-band thermal emitter including phase-changing material Ge2Sb2Te5 (GST) is experimentally demonstrated. Two emission peak wavelengths are at 7.36 μm and 5.40 μm at amorphous phase, and can be continuously tuned to 10.01 μm and 7.56 μm while GST is tuned to crystalline phase. Compared with other dual-band metamaterial emitters, this tunable dual-band thermal emitter is only composed of an array of single-sized GST nanodisks (on a gold film), which can greatly simplify the design and manufacturing process, and pave the way towards dynamical thermal emission control.

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Citations

Apr 1, 2020·Optics Express·Chaobiao ZhouJiangtao Liu
May 15, 2021·Optics Letters·Chuanchuan DingYiping Cui

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