High-contrast grating based planar light concentrators

Bala Pesala

doi:10.1117/12.924080

23 February 2012 High-contrast grating based planar light concentrators

Bala Pesala

Proceedings Volume 8270, High Contrast Metastructures; 82700Q (2012) https://doi.org/10.1117/12.924080
Event: SPIE OPTO, 2012, San Francisco, California, United States

Abstract

A new planar light concentrator design is proposed by using unique diffraction properties of high-contrast subwavelength gratings (HCGs). HCGs have the ability to diffract the incoming light at steep angles with very high efficiency. By integrating the HCGs on top of planar glass substrates, light can be guided in the glass leading to high concentration at the edges. Finite difference time domain simulation results show that concentration ratio close to 50 can be achieved by optimizing the grating parameters. These planar light concentrators find application in various areas including concentrated solar power, light pipes and spectrum splitters.

Citation Download Citation

Bala Pesala "High-contrast grating based planar light concentrators", Proc. SPIE 8270, High Contrast Metastructures, 82700Q (23 February 2012); https://doi.org/10.1117/12.924080

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