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Proceedings Paper

Light-guide-based diffractive solar concentrators
Author(s): Ties M. de Jong; Dick K. G. de Boer; Cees W. M. Bastiaansen
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Paper Abstract

Compact and inexpensive solar concentrators can be designed by using transmission gratings that diffract incident sunlight into a light guide. To this end a grating should have a small period and maintain a high diffraction efficiency over a wide range of incident angles. We numerically study the angular dependence of the diffraction efficiency of surface-relief gratings using Rigorous Coupled-Wave Analysis. It is shown how one can control the angular acceptance of gratings by tuning the refractive index or the grating topology. Gratings with a high refractive index maintain a high diffraction efficiency over a wide range of incident angles. By adjusting the topological symmetry one can design a grating with a high diffraction efficiency over a narrow range of incident angles, or a grating with a more homogenous distribution of the diffraction efficiency.

Paper Details

Date Published: 2 May 2012
PDF: 7 pages
Proc. SPIE 8438, Photonics for Solar Energy Systems IV, 84380X (2 May 2012); doi: 10.1117/12.922001
Show Author Affiliations
Ties M. de Jong, Eindhoven Univ. of Technology (Netherlands)
Dick K. G. de Boer, Philips Research Nederland B.V. (Netherlands)
Cees W. M. Bastiaansen, Queen Mary Univ. of London (United Kingdom)
Eindhoven Univ. of Technology (Netherlands)


Published in SPIE Proceedings Vol. 8438:
Photonics for Solar Energy Systems IV
Ralf Wehrspohn; Andreas Gombert, Editor(s)

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