Publications

Voltage tunable two-color infrared detection using semiconductor superlattices

Majumdar, Amlan; Choi, K.K.; Reno, J.L.; Tsui, D.C.

A voltage tunable two-color detector that contained multiple periods of AlGaAs/GaAs superlatice pairs was studied. It was found that the peak wavelength switched from 9.5 μm under large positive bias to 6 μm under negative bias. The background-limited temperature was found to be 55 K for 9.5 μm detection and 80 K for 6 μm detection. It was demonstrated that corrugated Quantum-well infrared photodetectors (C-QWIP) were capable of coupling normally incident light for this two color application.