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Thermal self-oscillations in radiative heat exchange
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics.
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics.ORCID iD: 0000-0002-0111-9009
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics.ORCID iD: 0000-0002-3368-9786
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics.
2015 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 106, no 6, 064103Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2015. Vol. 106, no 6, 064103
Keyword [en]
Electrodynamics, Metal insulator boundaries, Plates (structural components), Semiconductor insulator boundaries Amplitude of oscillation, External lasers, Fluctuational electrodynamics, Induced temperature, Radiative heat exchange, Self-oscillating systems, Self-oscillations, Threshold temperatures
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-162959DOI: 10.1063/1.4908188ISI: 000349845300092Scopus ID: 2-s2.0-84923875467OAI: oai:DiVA.org:kth-162959DiVA: diva2:800046
Funder
Swedish Research Council
Note

QC 20150401

Available from: 2015-04-01 Created: 2015-03-26 Last updated: 2017-12-04Bibliographically approved

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Dai, JinYan, Min

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