Near-field radiative heat transfer between two parallel SiO{sub 2} plates with and without microcavities

Journal Article · Mon Jan 12 00:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4905601· OSTI ID:22399123

Ijiro, T. ^[1]

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1. Graduate School of Energy and Environmental Science, Nagaoka University of Technology, Nagaoka, Niigata 940-2188 (Japan)

Near-to-far-field radiative heat transfer between two macroscopic SiO{sub 2} plates—with and without microcavities—was observed using a highly precise and accurate optical gap-measurement method. The experiments, conducted near 300 K, measured heat transfer as a function of gap separation from 1.0 μm to 50 μm and also as a function of temperature differences between 4.1 and 19.5 K. The gap-dependent heat flux was in excellent agreement with theoretical predictions. Furthermore, the effects of microcavities on the plate surfaces were clearly observed and significant enhancement of near-field radiative heat transfer was confirmed between gold-coated microcavities with narrow vacuum separation.

• OSTI ID: 22399123
• Journal Information: Applied Physics Letters, Vol. 106, Issue 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ENERGY GAP
GOLD
HEAT FLUX
HEAT TRANSFER
PLATES
SILICA
SILICON OXIDES
SURFACES
TEMPERATURE DEPENDENCE