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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 2 — Jan. 28, 2013
  • pp: 2147–2153

Linewidth enhancement in spasers and plasmonic nanolasers

Pavel Ginzburg and Anatoly V. Zayats  »View Author Affiliations

Optics Express, Vol. 21, Issue 2, pp. 2147-2153 (2013)

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The concept of spaser as the coherent near-field generator and nanolaser based on nanoscale plasmonic resonators has been successfully demonstrated in number of experiments. Here we have developed the theoretical framework for the basic linewidth description of these active plasmonic structures and, in particular, linewidth enhancement – additional line broadening due to the resonator noise. In order to achieve this, we have introduced explicitly the time dependence in the quasistatic description of localized surface plasmon resonances via inclusion of the dispersion of a spectral parameter defining the resonant frequency. Linewidth enhancement factor was estimated for semiconductor gain medium and was found to be of order of 3 to 6, strongly depending on carrier density in the active layer, and resulting in more than order of magnitude broader linewidth compared to that, predicted by the Schawlow-Townes theory.

© 2013 OSA

OCIS Codes
(140.4780) Lasers and laser optics : Optical resonators
(240.6680) Optics at surfaces : Surface plasmons
(350.4238) Other areas of optics : Nanophotonics and photonic crystals

ToC Category:
Lasers and Laser Optics

Original Manuscript: October 19, 2012
Revised Manuscript: December 15, 2012
Manuscript Accepted: December 16, 2012
Published: January 22, 2013

Virtual Issues
January 23, 2013 Spotlight on Optics

Pavel Ginzburg and Anatoly V. Zayats, "Linewidth enhancement in spasers and plasmonic nanolasers," Opt. Express 21, 2147-2153 (2013)

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