A voltage tunable three-color quantum well infrared photodetector (QWIP) consisting of asymmetric GaAs/AlGaAs double quantum wells has been demonstrated. The detector uses electron intersubband transitions in a coupled asymmetric double quantum well superlattice. The infrared photocurrent spectrum characterized using a blackbody monochromator source shows three prominent peaks appearing at 8.4 mum, 9.6 mum, and 10.3 mum under different biases. The three detection peaks are well resolved and can be independently selected by tuning the applied voltage. The responsivity and the detectivity of the detector at different biases and operating temperatures are characterized and found to be sufficient for detector operation at temperatures approximately 60 K.
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NATL RES COUNCIL CANADA,INST MICROSTRUCT SCI,OTTAWA K1A 0R6,ONTARIO,CANADANATL RES COUNCIL CANADA,INST MICROSTRUCT SCI,OTTAWA K1A 0R6,ONTARIO,CANADA
LIU, HC
LI, JM
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NATL RES COUNCIL CANADA,INST MICROSTRUCT SCI,OTTAWA K1A 0R6,ONTARIO,CANADANATL RES COUNCIL CANADA,INST MICROSTRUCT SCI,OTTAWA K1A 0R6,ONTARIO,CANADA
LI, JM
THOMPSON, JR
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NATL RES COUNCIL CANADA,INST MICROSTRUCT SCI,OTTAWA K1A 0R6,ONTARIO,CANADANATL RES COUNCIL CANADA,INST MICROSTRUCT SCI,OTTAWA K1A 0R6,ONTARIO,CANADA
THOMPSON, JR
WASILEWSKI, ZR
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NATL RES COUNCIL CANADA,INST MICROSTRUCT SCI,OTTAWA K1A 0R6,ONTARIO,CANADANATL RES COUNCIL CANADA,INST MICROSTRUCT SCI,OTTAWA K1A 0R6,ONTARIO,CANADA
WASILEWSKI, ZR
BUCHANAN, M
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NATL RES COUNCIL CANADA,INST MICROSTRUCT SCI,OTTAWA K1A 0R6,ONTARIO,CANADANATL RES COUNCIL CANADA,INST MICROSTRUCT SCI,OTTAWA K1A 0R6,ONTARIO,CANADA
BUCHANAN, M
SIMMONS, JG
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NATL RES COUNCIL CANADA,INST MICROSTRUCT SCI,OTTAWA K1A 0R6,ONTARIO,CANADANATL RES COUNCIL CANADA,INST MICROSTRUCT SCI,OTTAWA K1A 0R6,ONTARIO,CANADA