Enhanced photoconductive gain in quantum-well infrared photodetectors

M. A. Gadir, P. Harrison, R. A. Soref

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


A quantum-mechanical scattering theory approach is taken to evaluate the capture probability from the continuum into the quantum wells in quantum-well infrared photodetectors. The calculations show that the capture probability is dependent on the well width, the barrier height, and bias. An additional tunnel barrier is introduced to disturb the continuum levels near the top of the quantum well. It is shown that this can be optimized to reduce the capture probability and thus increase the photoconductive gain of the device.
Original languageEnglish
Pages (from-to)4272-4274
Number of pages3
JournalApplied Physics Letters
Issue number22
Early online date19 Nov 2002
Publication statusPublished - 25 Nov 2002
Externally publishedYes


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