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Rapidly tunable, narrow-band infrared filter arrays

United States Patent

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August 27, 2019
View the Complete Patent at the US Patent & Trademark Office
Tunable filters can use Fano metasurface designs having extremely narrow transmission bands. The Fano metasurface can comprise dielectric or semiconductor materials and can produce transmission bands with quality factors well in excess of 1000--at least a factor of 50 greater than typical metamaterial-based infrared resonances. Numerical simulations of these metasurfaces show that the spectral position of the passband can be changed by slightly changing the position of a small dielectric perturbation block placed within the near-field of the resonator by using simple electromechanical actuation architectures that allow for such motion. An array of independently tunable narrowband infrared filters can thereby be fabricated that only requires deep-subwavelength motions of perturbing objects in the resonator's near-field.
15/ 624,117
June 15, 2017
G02B 5/28 (20060101)G02B 5/20 (20060101)H01S 5/10 (20060101)H01S 5/12 (20060101)G02B 1/00 (20060101)G01J 3/12 (20060101)
STATEMENT OF GOVERNMENT INTEREST This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention.