MICROBOLOMETER DETECTORS WITH OPTICAL ABSORBER STRUCTURES FOR DETECTION OF TERAHERTZ RADIATION
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United States of America Patent
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Issued Date -
Aug 29, 2024
app pub date -
Sep 14, 2021
filing date -
Sep 14, 2021
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Abstract
A microbolometer pixel unit for detection of terahertz radiation includes a substrate, a thermistor structure, and an optical absorber structure. The thermistor structure includes a plurality of microbolometer pixels disposed on the substrate. Each pixel includes a thermistor platform suspended above the substrate, a thermistor support member holding the thermistor platform, and a thermistor disposed on the thermistor platform and having an electrical resistance that varies in accordance with a temperature of the thermistor. The optical absorber structure includes an absorber platform suspended above the thermistor structure, an absorber support member holding the absorber platform and including a plurality of support elements, each support element providing a thermal conduction path from the absorber platform to the thermistor platform of a respective one of the microbolometer pixels, and an optical absorber disposed on the absorber platform to absorb incoming terahertz radiation to generate heat to change the temperature of the thermistors.
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