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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 9 — Apr. 27, 2009
  • pp: 7206–7216

Enhanced third-order nonlinear effects in slowlight photonic-crystal slab waveguides of linedefect

Kuon Inoue, Hisaya Oda, Naoki Ikeda, and Kiyoshi Asakawa  »View Author Affiliations

Optics Express, Vol. 17, Issue 9, pp. 7206-7216 (2009)

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We experimentally studied enhancement of the third-order nonlinear optical phenomena, i.e., self-phase modulation due to optical Kerr effect and two-photon absorption (TPA) in a small group-velocity (Vg ) linedefect guided-mode of AlGaAs-based photonic-crystal slab waveguide. We found that the phase shift ∆φ or nominal Kerr constant n2 and TPA coefficient β were strikingly enhanced due to small Vg as the band edge was approached, such that they were proportional to (Vg )-2; the nonlinear refractive index n2 is enhanced proportional to Vg -1. We also observed that owing to this enhancement as well as an extremely small cross-section area, the energy required for inducing π-phase shift was very small, being of an order of a few pJ for 5 ps optical pulse and for a 0.5-mm long sample. Based on those results, we discuss the possibility of developing ultra-fast and ultrasmall all-optical switches that operate due to cross-phase modulation.

© 2009 Optical Society of America

OCIS Codes
(190.4390) Nonlinear optics : Nonlinear optics, integrated optics
(230.7400) Optical devices : Waveguides, slab
(250.3140) Optoelectronics : Integrated optoelectronic circuits
(130.5296) Integrated optics : Photonic crystal waveguides

ToC Category:
Nonlinear Optics

Original Manuscript: January 6, 2009
Revised Manuscript: March 24, 2009
Manuscript Accepted: March 24, 2009
Published: April 16, 2009

Kuon Inoue, Hisaya Oda, Naoki Ikeda, and Kiyoshi Asakawa, "Enhanced third-order nonlinear effects in slow-light photonic-crystal slab waveguides of line-defect," Opt. Express 17, 7206-7216 (2009)

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