Photocurrent noise in multi-quantum-well infrared photodetectors

Carbone, A.; Introzzi, R.; Liu, H. C.
June 2003
Applied Physics Letters;6/16/2003, Vol. 82 Issue 24, p4292
Academic Journal
We report on photocurrent noise in AlGaAs/GaAs quantum-well infrared photodetectors having nominally the same design, except the number of wells N. The power spectral density does not scale as the inverse of the number of wells N in the presence of infrared radiation. These features can be understood by taking into account the nonlinearity arising at high infrared power as a consequence of the nonuniform potential distribution through the quantum-well structure.


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