期刊
JOURNAL OF LIGHTWAVE TECHNOLOGY
卷 31, 期 19, 页码 3188-3194出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2013.2280716
关键词
Group index; group velocity dispersion (GVD); photonic crystal waveguide (PCW); slow light
资金
- National Natural Science Foundation of China [61376055]
- National Basic Research program of China [2010CB923204]
We propose a new type of photonic crystal waveguide structure to achieve wideband slow light with large group index and low dispersion. The waveguide is based on triangular lattice photonic crystal imposed by simply a selective altering the locations of the holes adjacent to the line defect. Keeping the group index at 31, 44, 61, 71, 94, and 132, respectively, while restricting its variation within a +/- 10% range, we accordingly attain an available bandwidth of 19.1, 13.0, 9.0, 7.5, 5.5, and 3.6 nm around 1550 nm. The normalized delay-bandwidth product keeps around 0.35 for all cases. Low dispersion slow light propagation is confirmed by studying the relative temporal pulsewidth spreading with the 2-D finite-difference time-domain method.
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