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Updated: May 10, 2026

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
Published on: July 18, 2015
Infrared polarizer employing multiple metal-film subwavelength gratings
Kazuo Shiraishi1, Hidehiko Yoda
1Graduate School of Engineering, Utsunomiya University, Utsunomiya 321-8585, Japan. kazuos@cc.utsunomiya-u.ac.jp
Abstract:
A multiple thin metal-film subwavelength grating is proposed for polarizers in the infrared wavelength region of 10-20 μm. The dependence of the transmission characteristics of the polarizers on structural parameters was obtained numerically, and the potential for high performance was confirmed experimentally. The measured TE-wave losses in a polarizer comprising a triangular triple Al-film grating are more than 45 and 35 dB for the wavelength ranges of 10-16 and 16-20 μm, respectively, while the net TM-wave losses are lower than 1.5 dB in the wavelength rage of 15-20 μm.

