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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Henry van Driel
  • Vol. 29, Iss. 9 — Sep. 1, 2012
  • pp: 2403–2409

Slow light structure with enhanced delay–bandwidth product

Kadir Üstün and Hamza Kurt  »View Author Affiliations

JOSA B, Vol. 29, Issue 9, pp. 2403-2409 (2012)

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In this study, we propose a special type of slow light photonic crystal (PC) waveguide structure to achieve slow light with an improved delay and bandwidth product (DBP). The waveguide is based on a triangular lattice PC with a line defect imposed by changing the radii and locations of the holes lying along the waveguide centerline. By altering the locations of these central holes, group indices ranging approximately from 25 to 40 are obtained over frequency intervals, attaining a nearly constant group index. It is also observed that the group index spectrum has an S-like shape under certain circumstances. The manipulations of structural parameters easily allow attaining higher or lower group indices. For special configurations, normalized DBPs can be enhanced up to a value of 0.554. According to the best of the authors’ knowledge, this value is the highest value achieved with PC waveguide structures, and this value is achieved without using any special optimization methods such as topology optimization. Group velocity dispersion values of various configurations are minimized to enable proper optical pulse propagation.

© 2012 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(260.2030) Physical optics : Dispersion
(130.5296) Integrated optics : Photonic crystal waveguides
(230.5298) Optical devices : Photonic crystals

ToC Category:
Integrated Optics

Original Manuscript: February 22, 2012
Revised Manuscript: July 10, 2012
Manuscript Accepted: July 10, 2012
Published: August 15, 2012

Kadir Üstün and Hamza Kurt, "Slow light structure with enhanced delay–bandwidth product," J. Opt. Soc. Am. B 29, 2403-2409 (2012)

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