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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 6 — Mar. 15, 2010
  • pp: 5707–5712

Wideband slow light and dispersion control in oblique lattice photonic crystal waveguides

Feng-Chun Leng, Wen-Yao Liang, Bin Liu, Tong-Biao Wang, and He-Zhou Wang  »View Author Affiliations


Optics Express, Vol. 18, Issue 6, pp. 5707-5712 (2010)
http://dx.doi.org/10.1364/OE.18.005707


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Abstract

We find that the angle between elementary lattice vectors obviously affects the bandwidth and dispersion of slow light in photonic crystal line-defect waveguides. When the fluctuation of group index is strictly limited in a ±1% range, the oblique lattice structures with the angle between elementary lattice vectors slightly larger than 60° have broader available bandwidth of flat band slow light than triangular lattice structures. For example, for the angle 66°, there are increases of the available bandwidth from 20% to 68% for several different structures. For the same angle and a ±10% variation in group velocity, when group indices are nearly constants of 30, 48.5, 80 and 130, their corresponding bandwidths of flat band reach 20 nm, 11.8 nm, 7.3 nm and 3.9 nm around 1550 nm, respectively. The increasing of bandwidth is related to the shift of the anticrossing point towards smaller wave numbers.

© 2010 OSA

OCIS Codes
(260.2030) Physical optics : Dispersion
(130.5296) Integrated optics : Photonic crystal waveguides

ToC Category:
Photonic Crystals

History
Original Manuscript: December 14, 2009
Revised Manuscript: January 17, 2010
Manuscript Accepted: January 30, 2010
Published: March 5, 2010

Citation
Feng-Chun Leng, Wen-Yao Liang, Bin Liu, Tong-Biao Wang, and He-Zhou Wang, "Wideband slow light and dispersion control in oblique lattice photonic crystal waveguides," Opt. Express 18, 5707-5712 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-6-5707


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