Ultraslow-light effects in symmetric and asymmetric waveguide structures with moon-like scatterers

doi:10.1007/s11467-016-0598-x

Front. Phys.

2017, Vol. 12

Issue (1) : 124204 https://doi.org/10.1007/s11467-016-0598-x

RESEARCH ARTICLE

Ultraslow-light effects in symmetric and asymmetric waveguide structures with moon-like scatterers

Yong Wan,Xiao-Hui Ge,Sheng Xu,Yue Guo,Feng Yuan(

)

College of Physics Science, Qingdao University, Qingdao 266071, China

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Abstract

Ultraslow-light effects in two-dimensional hexagonal-lattice coupled waveguide with moon-like scatterers were theoretically studied using the plane-wave expansion method. For symmetric structures, simulations showed that slow light with high group index can be achieved by shifting the scatterers and adjusting the radius of moon-like scatterers. The maximum group index was over 8.0×10⁴. For asymmetric structures, simulations showed that slow light with flat band and high group index can be obtained by shifting the scatterers, adjusting the radius of moon-like scatterers, and rotating the scatterers. The maximum group index was over 5.7×10⁵ with a “saddle-like” relationship between the frequency and group index.

Keywords moon-like scatterer slow light coupled waveguide photonic crystal

Corresponding Author(s): Feng Yuan

Issue Date: 17 October 2016

Cite this article:

Yong Wan,Xiao-Hui Ge,Sheng Xu, et al. Ultraslow-light effects in symmetric and asymmetric waveguide structures with moon-like scatterers[J]. Front. Phys. , 2017, 12(1): 124204.

URL:

https://academic.hep.com.cn/fop/EN/10.1007/s11467-016-0598-x
https://academic.hep.com.cn/fop/EN/Y2017/V12/I1/124204

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