Infrared detector
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ESO’s Paranal Observatory.[1]
An infrared detector is a
detector that reacts to infrared (IR) radiation. The two main types of detectors are thermal and photonic (photodetectors
).
The thermal effects of the incident IR radiation can be followed through many temperature dependent phenomena.[2]
pyroelectric detectors
are the most widespread.
The response time and sensitivity of photonic detectors can be much higher, but usually these have to be cooled to cut
p-n junction
on which photoelectric current appears upon illumination.
An infrared detector is hybridized by connecting it to a readout integrated circuit with indium bumps. This hybrid is known as a focal plane array.
Detector Materials
The materials basis for infrared detection devices are narrow-gap semiconductors, including compounds and alloys of bismuth, antimony, indium, cadmium, selenium and others.[3][4]
- Lead(II) sulfide (PbS)
- Mercury cadmium telluride (Known as MCT, HgCdTe)
- Indium antimonide (InSb)
- Indium arsenide
- Indium gallium arsenide
- Lead selenide
- QWIP
- Lithium tantalate (LiTaO3)
- Triglycine sulfate (TGS)
- Platinum silicide (PtSi)
See also
- Infrared imaging
References
- ^ "Revolutionary New High-speed Infrared Detector Sees First Light". Retrieved 15 June 2015.
- PMID 35630174.
- S2CID 237652629.
- ISBN 9780387747439.
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