Low group velocity in a photonic crystal coupled-cavity waveguide

doi:10.1088/1674-1056/21/4/044213

中国物理B ›› 2012, Vol. 21 ›› Issue (4): 44213-044213.doi: 10.1088/1674-1056/21/4/044213

张昌莘¹ ²,许兴胜¹

收稿日期:2011-07-26 修回日期:2011-11-03 出版日期:2012-02-29 发布日期:2012-02-29
通讯作者: 许兴胜,xsxu@ustc.edu E-mail:xsxu@ustc.edu

Low group velocity in a photonic crystal coupled-cavity waveguide

Zhang Chang-Xin(张昌莘)^a)b) and Xu Xing-Sheng(许兴胜)^a)†

a. State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;
b. Department of Physics, Guangdong University of Petrochemical, Maoming 525000, China

Received:2011-07-26 Revised:2011-11-03 Online:2012-02-29 Published:2012-02-29
Contact: Xu Xing-Sheng,xsxu@ustc.edu E-mail:xsxu@ustc.edu
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 60877030), the National High Technology Research and Development Program of China (Grant No. 2009AA03Z406), the Program of Visiting Professor for Senior International Scientists of the Chinese Academy of Sciences (Grant No. 2009G2-17), and the Science and Technology Program of Guangdong Province, China (Grant No. 2010B080701066).

摘要/Abstract

Abstract: A two-dimensional photonic crystal coupled-cavity waveguide is designed and optimized, the transmission spectrum is calculated by using the finite-difference time-domain method, and the group velocity of c/1856 is obtained. To our knowledge, this value of group velocity is the lowest group velocity in a photonic crystal waveguide calculated from its transmission spectrum so far. The result is confirmed by the photonic band structure calculated by using the plane wave expansion method, and it is found that the photonic crystal waveguide modes in a photonic band structure are in accordance with those in the transmission spectrum by using the finite-difference time-domain method. The mechanism of slow light in the coupled-cavity waveguide of photonic crystal is analysed.

Key words: photonic crystal wavguide, coupled cavity, slow light

中图分类号: (Photonic bandgap materials)

42.70.Qs

42.79.Gn (Optical waveguides and couplers) 42.60.Da (Resonators, cavities, amplifiers, arrays, and rings)

张昌莘, 许兴胜. [J]. 中国物理B, 2012, 21(4): 44213-044213.

Zhang Chang-Xin(张昌莘) and Xu Xing-Sheng(许兴胜) . Low group velocity in a photonic crystal coupled-cavity waveguide[J]. Chin. Phys. B, 2012, 21(4): 44213-044213.

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Low group velocity in a photonic crystal coupled-cavity waveguide

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