Tiled periodic metal film sensors
OwnerTirumala Ranganath, Mihail Sigalasinventors
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Abstract
In accordance with the invention, a tiled periodic metal film sensor can be used to measure refractive index changes of a thin layer of liquid to determine changes in the liquid composition. The tiled periodic metal film sensor senses reflected light as a function of wavelength and infers a change in the refractive index of the fluid. To determine changes in the composition of the liquid requires the ability to compensate for any ambient temperature changes
Claims20
A tiled periodic metal film sensor cell comprising:
- a first and second set of alternating tiles arranged in a checkerboard pattern wherein said first set of tiles is comprised of a first metal film deposited on a dielectric substrate and said second set of tiles is comprised of a second metal film deposited on a dielectric substrate, said first metal film patterned with a first periodic pattern and said second metal film patterned with a second periodic pattern such that said first and said second periodic patterns are different.
A system for determining the composition of a liquid in a microchannel comprising:
- a first tunable laser;
- a polarization maintaining optical fiber having a first end and second end, said first end optically coupled to said tunable laser;
- and
- a tiled periodic metal film sensor optically coupled to said second end of said polarization maintaining optical fiber.
A method for a tiled periodic metal film sensor cell comprising:
- providing a first and second set of alternating tiles arranged in a checkerboard pattern wherein said first set of tiles is comprised of a first metal film deposited on a dielectric substrate and said second set of tiles is comprised of a second metal film deposited on a dielectric substrate, patterning said first metal film with a first periodic pattern and patterning said second metal film with a second periodic pattern such that said first and said second periodic patterns are different.
Dependencies are inferred from the claim text.