Voltage-Controlled Tunable GaAs/AlGaAs Multistack Quantum Well Infrared Detector
CALIFORNIA INST OF TECH PASADENA
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We describe a new type of intersubband GaAsAlGaAs infrared detector consisting of three stacks of quantum wells the quantum wells in a given stack-are identical, but are different from stack to stack. Each stack is designed to yield an absorption and a photoresponse at a different peak wavelength. The resulting device is an infrared detector which can operate in a number of modes. Among the features of this device are a wide-band detection domain, a tunable response and excellent responsivities and noise figures. The tunable operation includes a sharp peak-switching response which follows the formation, expansion, and readjustment of electric field domains within the multiquantum well region.
- Infrared Detection and Detectors