J. Phys. Colloques
Volume 48, Numéro C5, Novembre 19873rd International Conference on Modulated Semiconductor Structures
|Page(s)||C5-611 - C5-614|
J. Phys. Colloques 48 (1987) C5-611-C5-614
SUPERLATTICE TUNNELING DETECTORS OPERATING AT λ = 10 µm, BASED ON QUANTUM WELL INTERSUBBAND ABSORPTIONB.F. LEVINE, K.K. CHOI, C.G. BETHEA, J. WALKER et R.J. MALIK
AT and T Bell Laboratories, Murray Hill, NJ 07974, U.S.A.
We demonstrate a novel 10.3 µm superlattice infrared detector based on doped quantum wells of GaAs/AlGaAs. Intersubband resonance radiation excites an electron from the ground state into the first excited state, where it rapidly tunnels out producing a photocurrent. We achieve a narrow bandwidth (10%) photosensitivity with a responsivity as large as 1.9 A/W and an estimated speed of 30 ps.