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Published April 8, 1996 | Published
Journal Article Open

Monolithic integration of quantum well infrared photodetector and modulator


A modulation depth of 40% (0.7 dB/µm) was obtained with an infrared (10.6 µm) modulator consisting of a stack of 50 pairs of weakly coupled asymmetric quantum wells monolithically integrated with a quantum well infrared photodetector. The monolithic integration is shown to be a promising technique for the "ac" coupling of infrared focal-plane arrays as well as for the direct study of the effects of electric fields and charge density variations on intersubband transitions.

Additional Information

©1996 American Institute of Physics. (Received 13 December 1995; accepted 8 February 1996) G. Almogy would like to acknowledge many fruitful discussions with I. Bar-Joseph and U. Meirav of Weizmann Institute. This work was funded in part by AFOSR, ARPA, and the Office of Naval Research under Award No. N00014-91-J-1195.

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