1. Strong Near-Field Enhancement of Radiative Heat Transfer between Metallic Surfaces.
- Author
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Kralik, Tomas, Hanzelka, Pavel, Zobac, Martin, Musilova, Vera, Fort, Tomas, and Horak, Michal
- Subjects
- *
HEAT radiation & absorption , *METALLIC surfaces , *NEAR-fields , *HEAT flux , *WAVELENGTHS - Abstract
Near-field heat transfer across a gap between plane-parallel tungsten layers in vacuo was studied experimentally with the temperature of the cold sample near 5 K and the temperature of the hot sample in the range 10-40 K as a function of the gap size d. At gaps smaller than one-third of the peak wavelength λm given by Wien's displacement law, the near-field effect was observed. In comparison with blackbody radiation, hundred times higher values of heat flux were achieved at d ≈1 μm. Heat flux normalized to the radiative power transferred between black surfaces showed scaling (λm/d)n, where n ≈ 2.6. This Letter describes the results of experiment and a comparison with present theory over 4 orders of magnitude of heat flux. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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