Thermal self-oscillations in radiative heat exchange

被引：9

作者：

Dyakov, S. A. ^{[1
]}

Dai, J. ^{[1
]}

Yan, M. ^{[1
]}

Qiu, M. ^{[1
,2
]}

机构：

[1] KTH Royal Inst Technol, Dept Mat & Nano Phys, Sch Informat & Commun Technol, S-16440 Kista, Sweden

[2] Zhejiang Univ, Dept Opt Engn, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2015年 / 106卷 / 06期

基金：

瑞典研究理事会; 中国国家自然科学基金;

关键词：

PHASE-TRANSITION; MATRIX-METHOD; VO2; SURFACE;

D O I：

10.1063/1.4908188

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the effect of relaxation-type self-induced temperature oscillations in the system of two parallel plates of SiO2 and VO2 which exchange heat by thermal radiation in vacuum. The nonlinear feedback in the self-oscillating system is provided by metal-insulator transition in VO2. Using the method of fluctuational electrodynamics, we show that under the action of an external laser of a constant power, the temperature of VO2 plate oscillates around its phase transition value. The period and amplitude of oscillations depend on the geometry of the structure. We found that at 500 nm vacuum gap separating bulk SiO2 plate and 50 nm thick VO2 plate, the period of self-oscillations is 2 s and the amplitude is 4K, which is determined by phase switching at threshold temperatures of phase transition. (C) 2015 AIP Publishing LLC.

引用

页数：4

共 24 条

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[2] Current-induced electrical self-oscillations across out-of-plane threshold switches based on VO2 layers integrated in crossbars geometry [J].