Plasmonic filters.

Passmore, Brandon Scott ; Shaner, Eric Arthur ; Barrick, Todd A.

Sandia National Laboratories

关键词: Dielectric Materials;    Tuning;    Wave Mechanics.;    36 Materials Science;    Sandia National Laboratories Wave Mechanics.;   

DOI  :  10.2172/973849
RP-ID  :  SAND2009-5990
RP-ID  :  AC04-94AL85000
RP-ID  :  973849

美国|英语

来源: UNT Digital Library

【 摘 要 】

Metal films perforated with subwavelength hole arrays have been show to demonstrate an effect known as Extraordinary Transmission (EOT). In EOT devices, optical transmission passbands arise that can have up to 90% transmission and a bandwidth that is only a few percent of the designed center wavelength. By placing a tunable dielectric in proximity to the EOT mesh, one can tune the center frequency of the passband. We have demonstrated over 1 micron of passive tuning in structures designed for an 11 micron center wavelength. If a suitable midwave (3-5 micron) tunable dielectric (perhaps BaTiO{sub 3}) were integrated with an EOT mesh designed for midwave operation, it is possible that a fast, voltage tunable, low temperature filter solution could be demonstrated with a several hundred nanometer passband. Such an element could, for example, replace certain components in a filter wheel solution.