Normal spectral emittance of a nickel metal surface with rectangular microcavities |
| |
| Authors: | Daisuke Hirashima Yuki Kameya Katsunori Hanamura |
| |
| Affiliation: | 1. Department of Mechanical Control and Engineering, Tokyo Institute of Technology, Japan;2. Research Center for Carbon Recycling and Energy, Tokyo Institute of Technology, Japan |
| |
| Abstract: | Spectral control of thermal radiation emitted from rectangular microcavities (0.5×0.5×0.5µm3) 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 |
| |
| Keywords: | spectral control thermal radiation microcavities |
|
|
