Mechanisms and methods for selective wavelength filtering

Optical waveguides – Planar optical waveguide

Reexamination Certificate

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C385S130000, C385S131000

Reexamination Certificate

active

11044063

ABSTRACT:
An optical filter includes a dielectric waveguide layer, supporting waveguide modes at specific wavelengths and receiving incident light, a corrugated film layer, composed of one of a metal and a semiconductor and positioned adjacent to a second surface of the waveguide layer and a sensor layer, wherein the sensor layer is capable of absorbing optical energy and generating a corresponding electrical signal. The metal film layer supports a plurality of plasmons, the plurality of plasmons producing a first field and is excited by a transverse mode of the waveguide modes at a wavelength interval. The first field penetrates the sensor layer and the sensor layer generates an electrical signal corresponding to an intensity of received incident light within the wavelength interval.

REFERENCES:
patent: 5485277 (1996-01-01), Foster
patent: 5809188 (1998-09-01), Tseng et al.
patent: 5841143 (1998-11-01), Tuma et al.
patent: 5986808 (1999-11-01), Wang
patent: 6034809 (2000-03-01), Anemogiannis
patent: 2003/0138208 (2003-07-01), Pawlak et al.

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