Journal
OPTICS COMMUNICATIONS
Volume 285, Issue 18, Pages 3704-3708Publisher
ELSEVIER
DOI: 10.1016/j.optcom.2012.04.027
Keywords
Slow light; Group-velocity dispersion; Waveguide; Photonic crystal
Categories
Funding
- National Natural Science Foundation of China [11074069, 61176116]
- Aid program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province
- Science Research Program of Educational Department of Hunan Province, China [09C851]
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To tailor the bandwidth and the group-velocity dispersion, we demonstrate a novel waveguide based on a photonic crystal within a triangular array with crescent-like-shaped air holes. By changing the angle between the waveguide axis and symmetric axis of the air hole from 0 to pi/2, we find that the available bandwidth with a nearly constant group index in excess of 22 increases from 7 nm to 13 nm, that the corresponding normalized delay-bandwidth product increases from 0.202 to 0.245, and that the absolute value of the group-velocity dispersion decreases from 13.500 ps(2)/km to 10 ps(2)/km. The origin of all the findings is related to the widening of the slow-light region with the increasing of the angle. (C) 2012 Elsevier B.V. All rights reserved.
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