Translator Disclaimer
21 August 2014 Broadband optical concentration technology based on grating side-coupling
Author Affiliations +
Though the technology of grating side-coupling is often applied in fields, such as coupling of light of single wavelength or narrow waveband, pump of fiber laser, integration of optical waveguide, its application for broadband coupling of visible spectrum is rarely studied. Sunlight can concentrate and output at the edge of waveguides by integrating sub-wavelength gratings with waveguides, making it a novel solar concentrator. In this paper, we simulated different grating structures with the finite-difference time-domain solution software (FDTD) to obtain the optimal structure design, since different grating structures feature different diffractive efficiencies. The result demonstrates that the structures mentioned above all feature good diffractive efficiencies in broadband wavelength, among which the blazing grating reaches the largest efficiency, namely 48.8%.This kind of sub-wavelength gratings feature integration of small size, which makes it promising in absorption of solar energy, such as lumination, photovoltaic cell, space melting, etc.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Luyun Lu and Kaiwei Wang "Broadband optical concentration technology based on grating side-coupling", Proc. SPIE 9283, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Design, Manufacturing, and Testing of Micro- and Nano-Optical Devices and Systems, 92830W (21 August 2014); doi: 10.1117/12.2069982;


Compact cavity design in solid state resonators by way of...
Proceedings of SPIE (February 27 2014)
Diffraction gratings for lighting applications
Proceedings of SPIE (September 29 2013)
Light-guide-based diffractive solar concentrators
Proceedings of SPIE (May 02 2012)
High-contrast grating based planar light concentrators
Proceedings of SPIE (February 22 2012)
Concentrator design to minimize LCOE
Proceedings of SPIE (September 10 2007)
Resonant grating filters at oblique incidence
Proceedings of SPIE (November 02 2003)

Back to Top