Room-temperature midinfrared two-photon photodetector

Schneider, H.; Liu, H. C.; Winnerl, S.; Drachenko, O.; Helm, M.; Faist, J.
September 2008
Applied Physics Letters;9/8/2008, Vol. 93 Issue 10, p101114
Academic Journal
We report on a two-photon detector based on resonantly enhanced nonlinear absorption between subbands in InGaAs/InAlAs quantum wells and demonstrate its use as a quadratic autocorrelator for midinfrared pulses. Modified device design allows for device operation at room temperature, which is crucial for applications in practical systems.


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