Rapidly tunable, narrow-band infrared filter arrays
| DWPI Title: Tunable, narrow-band infrared filter array, includes Fano metasurface which comprises periodic two-dimensional array of dielectric resonators on dielectric substrate, and perturbing object within near field of each dielectric resonator |
| Abstract: 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. |
| Use: Tunable, narrow-band infrared filter array based on Fano metasurface. |
| Advantage: An array of independently tunable narrow-band infrared filters can be fabricated that only requires deep-subwavelength motions of perturbing objects in the resonator's near-field. The overall size of the array required to achieve a robust Fano resonance is quite small. The design provides large tuning of the transmission band, while still maintaining small overall displacements of the perturbing block. |
| Novelty: The filter array (30') includes a Fano metasurface and an actuator. The Fano metasurface comprises a periodic two-dimensional array of dielectric resonators (31) on a dielectric substrate, and a perturbing object (32) within the near field of each dielectric resonator. Each dielectric resonator has an electric or magnetic dipole moment in the plane of the dielectric substrate that couples to normally incident light. The perturbing object induces coupling of at least one out-of-plane electric or magnetic dipole moment in the near-field to the in-plane electric or magnetic dipole moment. |
| Filed: 6/15/2017 |
| Application Number: US15624117A |
| Tech ID: SD 14212.0 |
| 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. |
| Data from Derwent World Patents Index, provided by Clarivate All rights reserved. Republication or redistribution of Clarivate content, including by framing or similar means, is prohibited without the prior written consent of Clarivate. Clarivate and its logo, as well as all other trademarks used herein are trademarks of their respective owners and used under license. |