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US 12,761,145 B2Granted
Thermomechanical infrared detector with metamaterial absorber
AssigneeSaudi Arabian Oil Company
InventorsHuseyin Rahmi Seren, Miguel Gonzalez
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Abstract
An infrared detector includes a tuning fork resonator comprising an mechanical-to-electrical transduction mechanism; a metamaterial absorber residing on at least one side of the tuning fork resonator, the metamaterial absorber comprising at least a material layer with subwavelength inclusions; and a signal processing circuit to translate the electrical signal into an amplitude of mechanical motion of the tuning fork.
Claims23
An infrared detector comprising:
- a tuning fork resonator comprising a mechanical-to-electrical transduction mechanism configured to output an electrical signal, wherein the tuning fork resonator comprises:
- a base,
- a first tine extending from the base, and
- a second tine extending from the base opposite the first tine;
- a metamaterial absorber residing on at least one side of the tuning fork resonator, the metamaterial absorber comprising at least a material layer with subwavelength inclusions, wherein a front surface of the first tine and the second tine are coated with the metamaterial absorber;
- and
- a signal processing circuit to translate the electrical signal into an amplitude of mechanical motion of the tuning fork.
4 more elements
A method comprising:
- receiving, from a testing chamber containing an analyte, modulated infrared light at a metamaterial absorber layer of a tuning fork resonator, the modulated infrared light causing the tuning fork resonator to vibrate at a frequency based in part on a modulation frequency of the infrared light and with an intensity corresponding to a concentration of the analyte present in the testing chamber;
- receiving an electrical signal representative of the intensity of the vibration of the tuning fork resonator;
- and
- determining the concentration of the analyte based on a comparison of the received electrical signal and a reference signal,
- wherein the electrical signal representative of an intensity of the vibration of the tuning fork resonator comprises an electrical signal generated from a photodetector receiving light reflected from an optical cavity formed on two tines of the tuning fork resonator.
2 more elements
A system comprising:
- a metamaterial thermomechanical detector comprising a metamaterial absorber residing on at least one side of the metamaterial thermomechanical detector, wherein the metamaterial thermomechanical detector comprises a tuning fork resonator comprising:
- a base,
- a first tine extending from the base, and
- a second tine extending from the base opposite the first tine, wherein a front surface of the first tine and the second tine are coated with the metamaterial absorber;
- a infrared light emitter;
- an analyte test chamber configured to contain an analyte;
- an infrared light emitter controller configured to provide a modulation signal for modulating emission of infrared light from the infrared light emitter;
- and
- a signal analysis processor comprising hardware circuitry and software, the signal analysis processor configured to:
- receive an electrical signal from the metamaterial thermomechanical detector, the electrical signal being representative of a vibrational intensity of the metamaterial thermomechanical detector,
- determine an intensity of infrared light of a predetermined frequency based on the received electrical signal, and
- determine a concentration of the analyte in the analyte test chamber based on the determined intensity of infrared light.
9 more elements
Dependencies are inferred from the claim text.