Low group velocity in a photonic crystal coupled-cavity waveguide  

作　　者：张昌莘 许兴胜 

机构地区：[1]State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083,China [2]Department of Physics, Guangdong University of Petrochemical, Maoming 525000, China

出　　处：《Chinese Physics B》2012年第4期357-363,共7页中国物理B（英文版）

基　　金：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);the Science and Technology Program of Guangdong Province, China (Grant No. 2010B080701066)

摘　　要：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.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.

关 键 词：photonic crystal wavguide coupled cavity slow light 

分 类 号：TN252[电子电信—物理电子学]