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Proceedings Paper

Development of solar selective absorbers and sky radiators based on two-dimensional diffractive grating surfaces
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Paper Abstract

Spectral properties of two-dimensional (2D) metal surface gratings are investigated to develop high performance solar selective absorbers and sky radiators. Numerical calculations based on rigorous coupled-wave analysis (RCWA) are performed and surface gratings are fabricated on silicon substrates by means of photolithography and etching process. Reflectivity spectra of the samples are measured and they show good spectral selectivity for each application. In order to fabricate surface microstructures in large area with low cost, direct metal imprinting technology are proposed. A microstructured nickel metal mold for the solar selective absorber surface is fabricated by means of electroplating technique and imprint experiments are performed on copper metal surface using mechanical pressing system. As a result, some parts of the surface structures are successfully transferred onto copper substrate.

Paper Details

Date Published: 15 April 2006
PDF: 9 pages
Proc. SPIE 6197, Photonics for Solar Energy Systems, 61970V (15 April 2006); doi: 10.1117/12.662672
Show Author Affiliations
Manabu Hasumi, Tohoku Univ. (Japan)
Hiroo Yugami, Tohoku Univ. (Japan)

Published in SPIE Proceedings Vol. 6197:
Photonics for Solar Energy Systems
Andreas Gombert, Editor(s)

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