New 10 μm infrared detector using intersubband absorption in resonant tunneling GaAlAs superlattices
- 20 April 1987
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 50 (16) , 1092-1094
- https://doi.org/10.1063/1.97928
Abstract
We demonstrate a novel 10.8 μm superlatticeinfrared detector based on dopedquantum 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 of 0.52 A/W and an estimated speed of 30 ps.Keywords
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