A periodic microstructure of the cubic cavity 6.0 μm wide, 6.0 μm deep, and 6.0 μm high is built on an ultraviolet curable resin via UV nanoimprinting. The 200 nm thick gold film is sputtered on the periodic micro structure. The hemispherical spectroscopic transmittance and reflectance of the periodic microstructure with the gold film are measured using a Fourier transform infrared spectrometer with an integrating sphere. The hemispherical spectroscopic transmittance is 0.0 from 2 to 15 μm wavelength. The hemispherical spectroscopic reflectance is 1.0 from 2 to 8 μm wavelength and from 12 to 15 μm wavelength. The bottom of the hemispherical spectroscopic reflectance is 0.4 near 10 μm. Assuming Kirchhoff’s law, the maximum normal emissivity of the periodic microstructure is 0.6 near 10 μm. It is clarified that the periodic microcavities with a gold film built via UV nanoimprinting and sputtering can enhance maximum spectral emissive power of radiation.
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ASME 2013 11th International Conference on Nanochannels, Microchannels, and Minichannels
June 16–19, 2013
Sapporo, Japan
Conference Sponsors:
- Fluids Engineering Division
- Heat Transfer Division
ISBN:
978-0-7918-5559-1
PROCEEDINGS PAPER
Emissivity of Wavelength-Selective Radiator With Periodic Microcavities Available to Purchase
Tsuyoshi Totani,
Tsuyoshi Totani
Hokkaido University, Sapporo, Hokkaido, Japan
JST PRESTO, Kawaguchi, Saitama, Japan
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Minoru Iwata,
Minoru Iwata
Kyushu Institute of Technology, Kitakyushu, Fukuoka, Japan
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Masashi Wakita,
Masashi Wakita
Hokkaido University, Sapporo, Hokkaido, Japan
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Harunori Nagata
Harunori Nagata
Hokkaido University, Sapporo, Hokkaido, Japan
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Tsuyoshi Totani
Hokkaido University, Sapporo, Hokkaido, Japan
JST PRESTO, Kawaguchi, Saitama, Japan
Minoru Iwata
Kyushu Institute of Technology, Kitakyushu, Fukuoka, Japan
Masashi Wakita
Hokkaido University, Sapporo, Hokkaido, Japan
Harunori Nagata
Hokkaido University, Sapporo, Hokkaido, Japan
Paper No:
ICNMM2013-73064, V001T09A003; 5 pages
Published Online:
December 4, 2013
Citation
Totani, T, Iwata, M, Wakita, M, & Nagata, H. "Emissivity of Wavelength-Selective Radiator With Periodic Microcavities." Proceedings of the ASME 2013 11th International Conference on Nanochannels, Microchannels, and Minichannels. ASME 2013 11th International Conference on Nanochannels, Microchannels, and Minichannels. Sapporo, Japan. June 16–19, 2013. V001T09A003. ASME. https://doi.org/10.1115/ICNMM2013-73064
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