Superconducting tunable inorganic filter

Details Superconducting tunable inorganic filter Superconducting tunable inorganic filter

1989-07-20

1992-08-25

Moskowitz, Nelson

Optical: systems and elements

Absorption filter

356234, G02R 524, H01C 716

Patent

active

051424185

ABSTRACT:
An optical filter structure for blocking radiation at or shorter than a preselected design wavelength is described which comprises a substantially transparent dielectric host material having dispersed therethrough a multiplicity of grains in preselected size and volume density within the dielectric, the grains comprising a material characterized by a transition between insulating and superconducting states at a characteristic transition temperature. The grains have diametric size substantially smaller then the longest wavelength of light to be absorbed, the filter absorbing resonantly via the dielectric anomaly and being tunable through selection of volume fraction of the grains within the dielectric.

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