Normal spectral emittance of a nickel metal surface with rectangular microcavities

✍ Scribed by Daisuke Hirashima; Yuki Kameya; Katsunori Hanamura

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 660 KB
• Volume: 38
• Category: Article
• ISSN: 1099-2871
• DOI: 10.1002/htj.20248

✦ Synopsis

Abstract

Spectral control of thermal radiation emitted from rectangular microcavities (0.5×0.5×0.5µm^3^) was investigated through emission experiments at high temperatures. The microcavities were fabricated on a mirror‐finished Ni metal surface. Through measurement of the normal spectral emittance, the maximum emittance was obtained around a wavelength of 0.87µm, which was very close to that (0.894µm) estimated from the cavity resonance theory. The emittance reached a maximum value of 0.95, and then decreased drastically with increasing wavelength, from the cut‐off wavelength. For a longer wavelength range from 1.7µm, it was equal to the emittance of the mirror‐finished surface. © 2009 Wiley Periodicals, Inc. Heat Trans Asian Res; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/htj.20248