Applicability of the angular properties of scatter elements as a tool to achieve improved slow light performance with small group velocity dispersion and large bandwidth in photonic crystal waveguides is investigated. A polyatomic photonic crystal waveguide, including two scatter elements with different geometrical shapes in each primitive cell, is proposed to investigate the feasibility of our method. Numerical results show that a versatile control of the dispersion relation of slow light modes, with large normalized delay-bandwidth products ranging from 0.2085 to 0.3394, can be obtained using a unique geometrical parameter.
© 2012 Chinese Optics Letters
Daobin Wang, Jie Zhang, Yongli Zhao, Sai Chen, Lihua Yuan, Jingli Lei, Cairong Zhang, and Shanglin Hou, "Enhanced slow light propagation in photonic crystal waveguides using angular properties of scatter elements," Chin. Opt. Lett. 10, 122301-122301 (2012)