Quantum well infrared photodetector
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A quantum well infrared photodetector (QWIP), is an infrared photodetector made from semiconductor materials which contain one or more quantum wells. These can be integrated together with electronics and optics to make infrared cameras for thermography. A very common well material is gallium arsenide, used with barrier material aluminium gallium arsenide. There are several companies world-wide manufacturing infrared systems which use QWIPs.
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