Light-guide-based diffractive solar concentrators

Ties M. de Jong; Dick K. G. de Boer; Cees W. M. Bastiaansen

doi:10.1117/12.922001

2 May 2012 Light-guide-based diffractive solar concentrators

Ties M. de Jong, Dick K. G. de Boer, Cees W. M. Bastiaansen

Proceedings Volume 8438, Photonics for Solar Energy Systems IV; 84380X (2012) https://doi.org/10.1117/12.922001
Event: SPIE Photonics Europe, 2012, Brussels, Belgium

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.

Citation Download Citation

Ties M. de Jong, Dick K. G. de Boer, and Cees W. M. Bastiaansen "Light-guide-based diffractive solar concentrators", Proc. SPIE 8438, Photonics for Solar Energy Systems IV, 84380X (2 May 2012); https://doi.org/10.1117/12.922001

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