Photovoltaic quantum well infrared detector
- 16 May 1988
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 52 (20) , 1701-1703
- https://doi.org/10.1063/1.99022
Abstract
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.Keywords
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