期刊
JOURNAL OF LIGHTWAVE TECHNOLOGY
卷 32, 期 11, 页码 2144-2151出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2014.2309612
关键词
Bandwidth; ellipse-shaped-hole; group index; slotted photonic crystal waveguide; slow light
资金
- National Natural Science Foundation of China [61273059, 61203206]
- Fundamental Research Funds for the Central Universities [110204002, N130604006]
- State Key Laboratory of Synthetical Automation for Process Industries [2013ZCX09]
Wideband slow light in an ellipse-shaped-hole slotted photonic crystal waveguide (ESPCW) has been theoretically demonstrated. By adjusting the length of major and minor axes of air holes and tuning the holes position of the second row adjacent to the slot, the group index and bandwidth of slow light can be engineered effectively at the same time. Through the optimization of ESPCW structures by the plane wave expansion (PWE) method, the nearly constant group indices at 46, 80.7, and 215.5 are obtained, and we accordingly attain the flat bandwidths of 4.81, 2.66, and 1.02 nm around the operating frequency of 1550 nm, while the variation of each group index is restricted within +/- 10% range. Meanwhile, the normalized delay-bandwidth product stays around 0.14, with minimal dispersion on the order of 10(6) ps(2)/km for all the cases.
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