Influence of temperature-dependent refractive index on thermal radiation from surface gratings

Hiroo Yugami; Takahiro Kamikawa; Yoshiaki Kanamori

doi:10.1117/12.662760

12 May 2006 Influence of temperature-dependent refractive index on thermal radiation from surface gratings

Hiroo Yugami, Takahiro Kamikawa, Yoshiaki Kanamori

Proceedings Volume 6197, Photonics for Solar Energy Systems; 61970W (2006) https://doi.org/10.1117/12.662760
Event: SPIE Photonics Europe, 2006, Strasbourg, France

Abstract

We set up a high-temperature ellipsometry system for the measurement of optical constants n and k. The n and k values of refractory metals of W and Mo were measured from the visible (VIS) to near infrared (NIR) wavelength range at several temperatures by means of the system. The n drastically increases especially in the NIR region, while the k is almost invariant in all the range with increasing temperatures. Numerical simulation based on rigorous coupled-wave analysis (RCWA) with the values of n and k measured by high-temperature ellipsometry is qualitatively coincident with the measured spectral emissivity at high temperature. It has revealed that spectral emissivity has temperature dependence especially in the NIR region.

Citation Download Citation

Hiroo Yugami, Takahiro Kamikawa, and Yoshiaki Kanamori "Influence of temperature-dependent refractive index on thermal radiation from surface gratings", Proc. SPIE 6197, Photonics for Solar Energy Systems, 61970W (12 May 2006); https://doi.org/10.1117/12.662760

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