Angular dependence of surface-relief gratings for solar and lighting applications

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

doi:10.1117/12.893311

21 September 2011 Angular dependence of surface-relief gratings for solar and lighting applications

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

Proceedings Volume 8124, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VIII; 81240D (2011) https://doi.org/10.1117/12.893311
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

Abstract

Transmission gratings that combine a large diffraction angle with a high diffraction efficiency and low angular and wavelength dispersion can be used to concentrate sunlight in a light guide and for lighting applications. Surface-relief gratings with sub-wavelength grating periods can have these properties. In this paper we study their diffraction efficiency for general conical angles of incidence. We show the presence of regions in the space of incident angles where light is efficiently coupled into or out of total internal reflection. It is demonstrated how this distribution of the diffraction efficiency over angular space can be adjusted by changing the grating geometry. Finally, these properties are qualitatively verified using holographically produced surface relief gratings.

Citation Download Citation

Ties M. de Jong, Dick K. G. de Boer, and Cees W. M. Bastiaansen "Angular dependence of surface-relief gratings for solar and lighting applications", Proc. SPIE 8124, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VIII, 81240D (21 September 2011); https://doi.org/10.1117/12.893311

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