12 May 2016 Long wave infrared tunable filter based on guided mode resonant effect
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We describe here a tunable long wave infrared (LWIR) band filter based on the guided mode resonant filter (GMRF) effect. The device consists of a subwavelength dielectric grating sandwiched between planar layers of contrasting dielectric materials. Using a rigorous electromagnetic design and analysis method we demonstrate how a strong narrow band reflectance can be induced. Moreover, the resonant wavelength can be easily tuned over the entire 8-12 micron band by mechanically tilting the device with respect to the optical axis. Simulation and experimental results are presented demonstrating the effectiveness of the device.
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Mark S. Mirotznik, Mark S. Mirotznik, Neelam Gupta, Neelam Gupta, Morgan McElhiney, Morgan McElhiney, Victoria Carey, Victoria Carey, } "Long wave infrared tunable filter based on guided mode resonant effect", Proc. SPIE 9855, Next-Generation Spectroscopic Technologies IX, 98550L (12 May 2016); doi: 10.1117/12.2229484; https://doi.org/10.1117/12.2229484

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