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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 1 — Jan. 14, 2013
  • pp: 756–763

Spectrum broadening of high-efficiency second harmonic generation in cascaded photonic crystal microcavities

Fang-Fang Ren, Jiandong Ye, Hai Lu, Rong Zhang, and Youdou Zheng  »View Author Affiliations

Optics Express, Vol. 21, Issue 1, pp. 756-763 (2013)

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An effective approach is proposed to broaden the spectrum of high-efficiency second harmonic generation in a one-dimensional photonic crystal based on the cascaded structure. By controlling the thickness of the joint layer, it is possible to realize a flat-top or quasiflat-top impurity band centered at the fundamental wavelength due to mode splitting effect in coupled cavities. Simulation results reveal that the spectrum of generated second harmonic exhibits a hump-like or multi-peak profile with wavelength tuning. It is a salient feature that the spectral stability of efficiency enhancement could be greatly improved compared to the conventional Lorentzian profile while maintaining an ultrahigh Q factor. Such merit of spectra re-shaping can significantly relax the stringent requirements for ultrahigh-Q microcavities in practical applications, e.g. fabrication inaccuracy, thermal variation, and wavelength detuning.

© 2013 OSA

OCIS Codes
(190.2620) Nonlinear optics : Harmonic generation and mixing
(140.3945) Lasers and laser optics : Microcavities
(230.5298) Optical devices : Photonic crystals

ToC Category:
Nonlinear Optics

Original Manuscript: October 10, 2012
Revised Manuscript: December 8, 2012
Manuscript Accepted: December 11, 2012
Published: January 7, 2013

Fang-Fang Ren, Jiandong Ye, Hai Lu, Rong Zhang, and Youdou Zheng, "Spectrum broadening of high-efficiency second harmonic generation in cascaded photonic crystal microcavities," Opt. Express 21, 756-763 (2013)

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