16 September 2014 Wideband slow light with low dispersion in lattice-shifted asymmetric photonic crystal waveguides
Author Affiliations +
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.
© 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
Yunhu Wu, Guoping Zhang, Lifeng Zhao, "Wideband slow light with low dispersion in lattice-shifted asymmetric photonic crystal waveguides," Optical Engineering 53(9), 097108 (16 September 2014). https://doi.org/10.1117/1.OE.53.9.097108 . Submission:
JOURNAL ARTICLE
7 PAGES


SHARE
Back to Top