Band gap of two-dimensional layered cylindrical photonic crystal slab and slow light of W1 waveguide

被引：0
|
作者：
Zhi-Wei Wang
Ya-Ting Xiang
Hai-Feng Zhang
机构：
[1] Nanjing University of Posts and Telecommunications,College of Electronic and Optical Engineering & College of Microelectronics
来源：
Optical and Quantum Electronics | 2021年 / 53卷
关键词：
Two-dimensional photonic crystals slab; Photonic crystal waveguide; Photonic band gap; Slow light; Plane wave expansion method;
D O I：
暂无
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学科分类号：
摘要：
In this paper, we apply the scatterers of cylindrical rings to a two-dimensional photonic crystals slab. The effects of the number of layers, the thickness, the index, and the height of the cylindrical layers on the photonic band gaps (PBGs) of such slab with different lattice arrangements are studied. It turns out that our new structure helps to obtain a large range of the PBGs. The maximum bandwidth is obtained with the value of 0.117 (2πc/a). The PBGs are moved to the lower frequencies with the augment of thickness, refractive index, and height. The choice of height, refractive index, and thickness is a trade-off, and adding the number of dielectric layers is not always positively correlated with the area of PBGs. In addition, in the W1 waveguide with a triangular lattice layout, we obtain a slow light of 0.026 × c. Compared with the square lattice, the triangular lattice is more suitable for slowing down the speed of light.
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