Infrared polarizer employing multiple metal-film subwavelength gratings | Zendy

Kazuo Shiraishi | Zendy; Hidehiko Yoda | Zendy

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Infrared polarizer employing multiple metal-film subwavelength gratings

Author(s) -

Kazuo Shiraishi,

Hidehiko Yoda

Publication year - 2013

Publication title -

optics express

Language(s) - Uncategorized

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.21.013998

Subject(s) - polarizer , materials science , optics , grating , wavelength , infrared , diffraction grating , refractive index , optoelectronics , physics , birefringence

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.

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