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.
No takes yet. Share an insight, caveat, or question.
Goossen et al. (1988) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: