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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 2 — Jan. 19, 2009
  • pp: 941–946

Active photonic crystal terahertz laser

A. Benz, Ch. Deutsch, G. Fasching, K. Unterrainer, A. M. Andrews, P. Klang, W. Schrenk, and G. Strasser  »View Author Affiliations

Optics Express, Vol. 17, Issue 2, pp. 941-946 (2009)

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We present the design and the realization of active photonic crystal (PhC) semiconductor lasers. The PhC consists of semiconductor nanostructure pillars which provide gain at a quantized transition energy. The vertical layer sequence is that of a terahertz quantum cascade laser. Thereby, the artificial crystal itself provides the optical gain and the lateral confinement. The cavities do not rely on a central defect, the lasing is observed in flat-band regions at high symmetry points. The experimental results are in excellent agreement with the finite-difference time-domain simulations. For the vertical confinement a double-metal waveguide is used. The lasers are showing a stable single-mode emission under all driving conditions. Varying the period of the PhC allows to tune the frequency by 400 GHz.

© 2009 Optical Society of America

OCIS Codes
(130.0250) Integrated optics : Optoelectronics
(260.3090) Physical optics : Infrared, far
(140.3945) Lasers and laser optics : Microcavities
(230.5298) Optical devices : Photonic crystals
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade

ToC Category:
Lasers and Laser Optics

Original Manuscript: September 12, 2008
Revised Manuscript: October 23, 2008
Manuscript Accepted: October 28, 2008
Published: January 13, 2009

A. Benz, Ch. Deutsch, G. Fasching, K. Unterrainer, A. M. Andrews, P. Klang, W. Schrenk, and G. Strasser, "Active photonic crystal terahertz laser," Opt. Express 17, 941-946 (2009)

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Fig. 1. Fig. 2. Fig. 3.

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