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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 11 — May. 24, 2010
  • pp: 11979–11989

Surface-emitting mid-infrared quantum cascade lasers with high-contrast photonic crystal resonators

Gangyi Xu, Raffaele Colombelli, Remy Braive, Gregoire Beaudoin, Luc Le Gratiet, Anne Talneau, Laurence Ferlazzo, and Isabelle Sagnes  »View Author Affiliations

Optics Express, Vol. 18, Issue 11, pp. 11979-11989 (2010)

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We have developed surface-emitting single-mode quantum cascade lasers which employ high-contrast photonic-crystal resonators. The devices operate on band-edge states of the photonic band-structure. The mode profile and polarization characteristics of the band-edge modes are calculated by three-dimensional finite-difference time-domain simulation. Experimentally, the spectral properties, the far-field patterns, and the polarization characteristics of the lasers are determined and compared with simulations. The good agreement between the simulations and the experiments confirms that the hexapolar mode at the Γ-point band-edge gives rise to lasing. By using a novel and advanced fabrication method, deep and vertical PhC holes are fabricated with no metal redeposition on the sidewalls, which improves the laser performance with respect to the current status. The angular of the output beam is ≈ 15°, and the side mode suppression ratio of the single mode emission is about 25 dB. The threshold current density at 78K and the maximum operation temperature are 7.6 kA/cm2 and 220 K, respectively. The performance is mainly limited by the loss induced by surface plasmon waveguide, which can be overcome by using an optimized dielectric waveguide structure.

© 2010 Optical Society of America

OCIS Codes
(140.5960) Lasers and laser optics : Semiconductor lasers
(230.5750) Optical devices : Resonators
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Lasers and Laser Optics

Original Manuscript: March 29, 2010
Revised Manuscript: May 3, 2010
Manuscript Accepted: May 3, 2010
Published: May 21, 2010

Gangyi Xu, Raffaele Colombelli, Remy Braive, Gregoire Beaudoin, Luc Le Gratiet, Anne Talneau, Laurence Ferlazzo, and Isabelle Sagnes, "Surface-emitting mid-infrared quantum cascade lasers with high-contrast photonic crystal resonators," Opt. Express 18, 11979-11989 (2010)

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