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US 11,624,742 B2Granted
Photonic crystal gas sensor
AssigneeThe Board of Regents of the University of Oklahoma
InventorBinbin Weng
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Abstract
A gas sensor comprising: a substrate; a grating array disposed on top of the substrate and comprising grates; and voids defined by the grates and configured to confine gas molecules for absorption of light and analysis. A method of gas sensing comprising: generating first light; converting the first light into second light using grates of a grating array; resonating the second light within the grating array; confining gas molecules in voids defined by the grates; and causing the gas molecules to absorb the second light within the voids.
Claims19
A gas sensor system comprising:
- a gas sensor comprising:
- a substrate, a grating array, and a signal detector, wherein:
- (1) the grating array is disposed on a top surface of the substrate and comprises a plurality of grates which define a plurality of voids configured to confine gas molecules for absorption of light and analysis,
- (2) the plurality of grates are configured to absorb a first light having a first wavelength, and convert the first light into a second light having a second wavelength which is greater than the first wavelength, and
- (3) the signal detector is configured to accept a third light remaining after the gas molecules confined in the plurality of voids absorb a portion of the second light, and to convert the third light into an electrical signal.
2 more elements
A gas sensing method, comprising:
- providing a gas sensing system comprising a gas sensor, the gas sensor comprising:
- a substrate, a grating array, and a signal detector, wherein:
- (1) the grating array is disposed on a top surface of the substrate and comprises a plurality of grates which define a plurality of voids configured to confine gas molecules for absorption of light and analysis,
- (2) the plurality of grates are configured to absorb a first light having a first wavelength, and convert the first light into a second light having a second wavelength which is greater than the first wavelength, and
- (3) the signal detector is configured to accept a third light remaining after the gas molecules confined in the plurality of voids absorb a portion of the second light, and to convert the third light into an electrical signal;
- and
- inputting the electrical signal into a computer which is operatively coupled to the signal detector, wherein the electrical signal is analyzed to determine if the gas molecules exhibit a predetermined fingerprint.
4 more elements
Dependencies are inferred from the claim text.