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Nanoreplica molding enables stacking of multiple 2D photonic crystals on a large area plastic substrate to improve optical density and angular tolerance of the resulting narrowband optical limiting filter, used for laser eye/sensor protection.
An optically tunable narrowband reflectance filter is fabricated on a plastic substrate over large surface areas using nanoreplica molding. The reflection peak wavelength was tuned −25 nm using an optically active azobenzene liquid crystal film.
An optically tunable narrowband reflectance filter is fabricated on a plastic substrate over large surface areas using nanoreplica molding. The reflection peak wavelength was tuned -25 nm using an optically active azobenzene liquid crystal film.
This work describes the first implementation of a plastic-based photonic crystal filter at visible wavelengths that incorporates a variable refractive-index material for voltage-controlled actuation of the transmission wavelength band. Using a replica-molding approach, device structures are inexpensively fabricated over large surface areas, and the fabrication approach enables control of individual...
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