Two-photon intersubband transitions in quantum well infrared photoconductors

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DOIResolve DOI: http://doi.org/10.1063/1.113004
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TypeArticle
Journal titleApplied Physics Letters
Volume65
Issue12
Pages15601562; # of pages: 3
SubjectALUMINIUM ARSENIDES; GAIN; GALLIUM ARSENIDES; INFRARED SPECTRA; PHOTOCURRENTS; PHOTODETECTORS; QUANTUM WELLS; SPECTRAL RESPONSE; TWOPHOTON SPECTRA
AbstractWe demonstrate that a symmetric GaAs/GaAlAs quantum well photodetector with a peak responsivity centered at 8.1 µm shows a significant quadratic power response at 10.6 µm. This is due to intersubband two-photon transitions from the ground level to continuum states. The two-photon responsivity agrees with a theoretical prediction based on a perturbative approach and photoconductive gain estimations.
Publication date
AffiliationNational Research Council Canada; NRC Institute for Microstructural Sciences; NRC Steacie Institute for Molecular Sciences
Peer reviewedNo
NPARC number12338939
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Record identifier3cd71254-c1af-4ca6-9684-62a1dc2e04d1
Record created2009-09-11
Record modified2016-05-09
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