Wide-angle beam splitting by use of positive-negative refraction in photonic crystals.
We present a positive-negative refraction effect in which, under certain conditions, an incident plane wave launched into a photonic crystal excites a positive-refracted Bloch wave and a negative-refracted Bloch wave simultaneously, both of which maintain the polarization. By utilizing this phenomenon, wide-angle beam splitting can be realized at the microscale level. Numerical simulations are employed to demonstrate this anomalous refraction behavior.
Luo
Ye
Y
Department of Electronic Engineering, Tsinghua University, Beijing 100084, China. xiut97@mails.tsinghua.edu.cn
Zhang
Wei
W
Huang
Yidong
Y
Zhao
Jianhui
J
Peng
Jiangde
J