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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 15 — Jul. 20, 2009
  • pp: 12279–12284

Terahertz two-photon quantum well infrared photodetector

H. Schneider, H. C. Liu, S. Winnerl, C. Y. Song, M. Walther, and M. Helm  »View Author Affiliations

Optics Express, Vol. 17, Issue 15, pp. 12279-12284 (2009)

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A two-photon detector based on intersubband transitions in GaAs/AlGaAs quantum wells operating in the Terahertz regime below the Reststrahlenband is reported. Resonantly enhanced optical nonlinearities enables sensitive quadratic detection at pJ pulse energies. We demonstrate its use in a quadratic autocorrelator for far-infrared picosecond pulses at around 7 THz.

© 2009 Optical Society of America

OCIS Codes
(190.5970) Nonlinear optics : Semiconductor nonlinear optics including MQW
(300.6530) Spectroscopy : Spectroscopy, ultrafast
(040.2235) Detectors : Far infrared or terahertz

ToC Category:

Original Manuscript: March 19, 2009
Revised Manuscript: June 9, 2009
Manuscript Accepted: June 29, 2009
Published: July 6, 2009

H. Schneider, H. C. Liu, S. Winnerl, C. Y. Song, M. Walther, and M. Helm, "Terahertz two-photon quantum well infrared photodetector," Opt. Express 17, 12279-12284 (2009)

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