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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 24 — Nov. 24, 2008
  • pp: 19830–19835

Electrically switchable emission in terahertz quantum cascade lasers

Joshua R. Freeman, Owen P. Marshall, Harvey E. Beere, and David A. Ritchie  »View Author Affiliations

Optics Express, Vol. 16, Issue 24, pp. 19830-19835 (2008)

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Electrically switchable emission in a terahertz quantum cascade laser is demonstrated. Two active region designs are incorporated into the same waveguide, forming a heterogeneous cascade that lases at frequencies around 2.6 THz and 3.0 THz. We find that the position of the active regions within the waveguide does not effect the sequence in which the two colours reach laser threshold. The devices show good performance, with 2.6THz and 3.0THz modes operating up to 60K and 91K respectively and displaying thresholds as low as 79Acm-2 for the 2.6 THz mode.

© 2008 Optical Society of America

OCIS Codes
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade

ToC Category:
Lasers and Laser Optics

Original Manuscript: September 12, 2008
Revised Manuscript: October 17, 2008
Manuscript Accepted: October 27, 2008
Published: November 14, 2008

Joshua R. Freeman, Owen P. Marshall, Harvey E. Beere, and David A. Ritchie, "Electrically switchable emission in terahertz quantum cascade lasers," Opt. Express 16, 19830-19835 (2008)

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