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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 17 — Aug. 13, 2012
  • pp: 18876–18886

High quality beaming and efficient free-space coupling in L3 photonic crystal active nanocavities

S. Haddadi, L. Le-Gratiet, I. Sagnes, F. Raineri, A. Bazin, K. Bencheikh, J. A. Levenson, and A. M. Yacomotti  »View Author Affiliations


Optics Express, Vol. 20, Issue 17, pp. 18876-18886 (2012)
http://dx.doi.org/10.1364/OE.20.018876


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Abstract

We report on far-field measurements of L3 photonic crystal (PhC) cavities with high quality beaming. This is achieved by means of the so-called “band folding” technique, in which a modulation of the radius of specific holes surrounding the cavity is introduced. Far-field patterns are measured from photoluminescence of quantum wells embedded in the PhC. A very good agreement between experimental results and simulated radiation patterns has been found. Laser effect is demonstrated in the beaming cavity with a threshold comparable to the regular one. In addition, free-space input coupling to this cavity has been achieved. In order to fully analyze the coupling efficiency, we generalize the approach developed in S. Fan, et al., [J. Opt. Soc. Am. A 20, 569 (2003)], relaxing the hypothesis of mirror symmetry. The obtained coupling efficiencies are about 15% with quality factors (Q) exceeding 104. These results further validate the “folding” technique on L3 cavities for nanocavity realization with efficient free-space coupling and high Q factors.

© 2012 OSA

OCIS Codes
(140.3945) Lasers and laser optics : Microcavities
(350.4238) Other areas of optics : Nanophotonics and photonic crystals

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: May 7, 2012
Revised Manuscript: July 1, 2012
Manuscript Accepted: July 1, 2012
Published: August 2, 2012

Citation
S. Haddadi, L. Le-Gratiet, I. Sagnes, F. Raineri, A. Bazin, K. Bencheikh, J. A. Levenson, and A. M. Yacomotti, "High quality beaming and efficient free-space coupling in L3 photonic crystal active nanocavities," Opt. Express 20, 18876-18886 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-17-18876


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