title: Optical properties of a square-lattice photonic crystal within the partial bandgap.
abstract: Optical properties of a two-dimensional square-lattice photonic crystal are systematically investigated within the partial bandgap through anisotropic characteristics analysis and numerical simulation of field pattern. Using the plane-wave expansion method and Hellmann-Feynman theorem, the relationships between the incident and refracted angles for both phase and group velocities are calculated to analyze light propagation from air to photonic crystals. Three kinds of flat slab focusing are summarized and demonstrated by numerical simulations using the multiple scattering method.
authors.affiliation: Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China.
authors.forename: Zhixiang
authors.initials: Z
authors.lastname: Tang
authors.forename: Runwu
authors.initials: R
authors.lastname: Peng
authors.forename: Yunxia
authors.initials: Y
authors.lastname: Ye
authors.forename: Chujun
authors.initials: C
authors.lastname: Zhao
authors.forename: Dianyuan
authors.initials: D
authors.lastname: Fan
authors.forename: Hao
authors.initials: H
authors.lastname: Zhang
authors.forename: Shuangchun
authors.initials: S
authors.lastname: Wen