| 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. |