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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 29, Iss. 4 — Apr. 1, 2012
  • pp: 577–588

From vertical-cavities to hybrid metal/photonic-crystal nanocavities: towards high-efficiency nanolasers

Se-Heon Kim, Jingqing Huang, and Axel Scherer  »View Author Affiliations


JOSA B, Vol. 29, Issue 4, pp. 577-588 (2012)
http://dx.doi.org/10.1364/JOSAB.29.000577


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Abstract

We provide a numerical study showing that a bottom reflector is indispensable to achieve unidirectional emission from a photonic-crystal (PhC) nanolaser. First, we study a PhC slab nanocavity suspended over a flat mirror formed by a dielectric or metal substrate. We find that the laser’s vertical emission can be enhanced by more than a factor of 6 compared with the device in the absence of the mirror. Then, we study the situation where the PhC nanocavity is in contact with a flat metal surface. The underlying metal substrate may serve as both an electrical current pathway and a heat sink, which would help achieve continuous-wave lasing operation at room temperature. The design of the laser emitting at 1.3 μm reveals that a relatively high cavity Q of over 1000 is achievable assuming room-temperature gold as a substrate. Furthermore, linearly polarized unidirectional vertical emission with the radiation efficiency over 50% can be achieved. Finally, we discuss how this hybrid design relates to various plasmonic cavities and propose a useful quantitative measure of the degree of the “plasmonic” character in a general metallic nanocavity.

© 2012 Optical Society of America

OCIS Codes
(140.5960) Lasers and laser optics : Semiconductor lasers
(240.6680) Optics at surfaces : Surface plasmons
(140.3945) Lasers and laser optics : Microcavities
(230.5298) Optical devices : Photonic crystals

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: September 1, 2011
Revised Manuscript: December 1, 2011
Manuscript Accepted: December 2, 2011
Published: March 9, 2012

Virtual Issues
Vol. 7, Iss. 6 Virtual Journal for Biomedical Optics

Citation
Se-Heon Kim, Jingqing Huang, and Axel Scherer, "From vertical-cavities to hybrid metal/photonic-crystal nanocavities: towards high-efficiency nanolasers," J. Opt. Soc. Am. B 29, 577-588 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-4-577

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