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Large-angle Quasi-self-collimation Effect in a Rod-type Photonic Crystal by Li, Ming; Li, Wei; Huang, Haiyang; Wang, Jing; Li, You; Wu, Aimin; Sheng, Zhen; Wang, Xi; Zou, Shichang; Gan, Fuwan is a scholarly article available to read on EtoBox.

What is Large-angle Quasi-self-collimation Effect in a Rod-type Photonic Crystal about?

A rod-type photonic crystal (PC) with a rectangular lattice shows a large-angle quasi-self-collimation (quasi-SC) effect by changing the symmetry of its rectangular lattice to straighten one of the isofrequency contours. To investigate the straightness of the isofrequency contour as well as the quasi-SC effect, we propose a straightness factor L based on the method of least squares. With L smaller than L0 (L0 = 0.01 is the critical value), the isofrequency contour is sufficiently straight to induce quasi-SC effect with the beam quasi-collimating in the structure. Furthermore, the efficiency of light coupling to the quasi-SC PC is studied, and can be greatly improved by applying a carefully designed antireflection layer.

Author

Li, Ming; Li, Wei; Huang, Haiyang; Wang, Jing; Li, You; Wu, Aimin; Sheng, Zhen; Wang, Xi; Zou, Shichang; Gan, Fuwan

Published

2015

Language

EN