title: Wide-angle beam splitting by use of positive-negative refraction in photonic crystals.
abstract: 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.
authors.affiliation: Department of Electronic Engineering, Tsinghua University, Beijing 100084, China. xiut97@mails.tsinghua.edu.cn
authors.forename: Ye
authors.initials: Y
authors.lastname: Luo
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.forename: Yidong
authors.initials: Y
authors.lastname: Huang
authors.forename: Jianhui
authors.initials: J
authors.lastname: Zhao
authors.forename: Jiangde
authors.initials: J
authors.lastname: Peng