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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 31 — Nov. 1, 2011
  • pp: G98–G103

Wideband slow light with ultralow dispersion in a W1 photonic crystal waveguide

Jian Liang, Li-Yong Ren, Mao-Jin Yun, and Xing-Jun Wang  »View Author Affiliations


Applied Optics, Vol. 50, Issue 31, pp. G98-G103 (2011)
http://dx.doi.org/10.1364/AO.50.000G98


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Abstract

A dispersion tailoring scheme for obtaining slow light in a silicon-on-insulator W1-type photonic crystal waveguide, novel to our knowledge, is proposed in this paper. It is shown that, by simply shifting the first two rows of air holes adjacent to the waveguide to specific directions, slow light with large group- index, wideband, and low group-velocity dispersion can be realized. Defining a criterion of restricting the group-index variation within a ± 0.8 % range as a flattened region, we obtain the ultraflat slow light with bandwidths over 5.0, 4.0, 2.5, and 1.0 nm when keeping the group index at 38.0, 48.8, 65.2, and 100.4, respectively. Numerical simulations are performed utilizing the three-dimensional (3D) plane-wave expansion method and the 3D finite-difference time-domain method.

© 2011 Optical Society of America

OCIS Codes
(230.3990) Optical devices : Micro-optical devices
(230.7390) Optical devices : Waveguides, planar
(260.2030) Physical optics : Dispersion
(230.5298) Optical devices : Photonic crystals

History
Original Manuscript: July 1, 2011
Revised Manuscript: September 21, 2011
Manuscript Accepted: September 21, 2011
Published: October 20, 2011

Citation
Jian Liang, Li-Yong Ren, Mao-Jin Yun, and Xing-Jun Wang, "Wideband slow light with ultralow dispersion in a W1 photonic crystal waveguide," Appl. Opt. 50, G98-G103 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-31-G98


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