Tunable cross-coupling evanescent mode optical devices and...

Details Tunable cross-coupling evanescent mode optical devices and... Tunable cross-coupling evanescent mode optical devices and...

2005-10-18

2005-10-18

Porta, David (Department: 2878)

Radiant energy

Luminophor irradiation

C250S459100

Reexamination Certificate

active

06956221

ABSTRACT:
Tunable cross-coupling evanescent mode optical devices and methods of making the same are described. In one aspect, a tunable optical device includes a first layer, a second layer, a metal layer disposed between the first and second layers, and an electrode. The first layer is supportable of electromagnetic field modes over a range of wavelengths that includes a target wavelength range. The second layer is disposed between the metal layer and the electrode and has an index of refraction that is adjustable over a range of values. The metal layer is disposed between the first and second layers and has at least one corrugated metal film region with a corrugation periodicity enabling cross-coupling of evanescent modes of equal wavelength within the target wavelength range and localized on opposite sides of the metal layer with different respective wavenumbers. The cross-coupling evanescent modes have a cross-coupling wavelength determined at least in part by the corrugation periodicity and the index of refraction of the first and second layers and is substantially unaffected by the electrode.

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