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Optical Engineering

Wideband slow light with low dispersion in lattice-shifted asymmetric photonic crystal waveguides
Author(s): Yunhu Wu; Guoping Zhang; Lifeng Zhao
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Paper Abstract

We propose a different type of asymmetric photonic crystal waveguide to achieve slow light with improved normalized delay-bandwidth product and low group velocity dispersion. The lateral symmetry of the proposed waveguide is broken by periodically shifting the two rows of air holes adjacent to the line defect. Under two simple different procedures of shifting air holes, the group indices of 41, 50, 68, and 114 with bandwidths over 14.9, 11, 7.8, and 4.7 nm, and the group indices of 43, 54, 73, and 124 with bandwidths over 13.9, 10.4, 7.1, and 4.3 nm around 1550 nm are obtained, respectively. Low-dispersion slow light propagation is confirmed by studying the relative temporal pulse-width spreading with the two-dimensional finite-difference time-domain method.

Paper Details

Date Published: 16 September 2014
PDF: 7 pages
Opt. Eng. 53(9) 097108 doi: 10.1117/1.OE.53.9.097108
Published in: Optical Engineering Volume 53, Issue 9
Show Author Affiliations
Yunhu Wu, Central China Normal Univ. (China)
Kashi Normal College (China)
Guoping Zhang, Central China Normal Univ. (China)
Lifeng Zhao, Kashi Normal College (China)

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