Journal
OPTICS LETTERS
Volume 42, Issue 3, Pages 518-521Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.42.000518
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We experimentally demonstrate a long-wavelength infrared narrowband transmission filter using an asymmetric subwave-length dielectric grating. A two-step grating geometry is used to define the asymmetry, which enables resonant narrowband transmission response at normal incidence. Computational modeling is used to show that varying the grating parameter dimensions can shift the transmission peak wavelength. Silicon/air gratings are experimentally demonstrated, with the peak transmission wavelength varying between 10 and 11.3 mu m. (C) 2017 Optical Society of America
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