Photovoltaic quantum well infrared detector

K. W. Goossen, S. A. Lyon, K. Alavi

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


A photovoltaic infrared detector based on photoemission from a single modulation doped GaAs-AlGaAs quantum well is presented. The modulation doping provides a built-in field which allows unbiased operation. We show results from a device which is sensitive to 180 meV (7 μm wavelength) light, with a bandwidth of 20 meV, for which we estimate the quantum efficiency to be 1%. We demonstrate that the detector may be tuned to different wavelengths by varying the width of the well.

Original languageEnglish (US)
Pages (from-to)1701-1703
Number of pages3
JournalApplied Physics Letters
Issue number20
StatePublished - 1988

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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