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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 33, Iss. 4 — Feb. 15, 2008
  • pp: 312–314

Surface plasmon quantum cascade lasers as terahertz local oscillators

M. Hajenius, P. Khosropanah, J. N. Hovenier, J. R. Gao, T. M. Klapwijk, S. Barbieri, S. Dhillon, P. Filloux, C. Sirtori, D. A. Ritchie, and H. E. Beere  »View Author Affiliations


Optics Letters, Vol. 33, Issue 4, pp. 312-314 (2008)
http://dx.doi.org/10.1364/OL.33.000312


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Abstract

We characterize a heterodyne receiver based on a surface-plasmon waveguide quantum cascade laser (QCL) emitting at 2.84 THz as a local oscillator, and an NbN hot electron bolometer as a mixer. We find that the envelope of the far-field pattern of the QCL is diffraction-limited and superimposed onto interference fringes, which are similar to those found in narrow double-metal waveguide QCLs. Compared to the latter, a more directional beam allows for better coupling of the radiation power to the mixer. We obtain a receiver noise temperature of 1050 K when the mixer is at 2 K , which, to our knowledge, is the highest sensitivity reported at frequencies beyond 2.5 THz .

© 2008 Optical Society of America

OCIS Codes
(040.0040) Detectors : Detectors
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.5960) Lasers and laser optics : Semiconductor lasers

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: November 13, 2007
Revised Manuscript: December 16, 2007
Manuscript Accepted: December 17, 2007
Published: February 6, 2008

Citation
M. Hajenius, P. Khosropanah, J. N. Hovenier, J. R. Gao, T. M. Klapwijk, S. Barbieri, S. Dhillon, P. Filloux, C. Sirtori, D. A. Ritchie, and H. E. Beere, "Surface plasmon quantum cascade lasers as terahertz local oscillators," Opt. Lett. 33, 312-314 (2008)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-33-4-312

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