title: Asymmetric light propagation in transverse separation modulated photonic lattices.
abstract: We investigate, both theoretically and numerically, the asymmetric light propagation in transverse separation modulated photonic lattices. The theoretical results show that the transmission contrast η of the structure is determined only by the coupling strengths between the chirped lattice and the two boundary uniform lattice portions. The numerical studies demonstrate that η is independent of the separation modulation function of the chirped lattice, which is in good agreement with the theory.
authors.affiliation: National Key Laboratory of Photoelectric Technology and Functional Materials (Culture Base), and Institute of Photonics and Photon-Technology, Northwest University, Xi’an 710069, China.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Cao
authors.forename: Xinyuan
authors.initials: X
authors.lastname: Qi
authors.forename: Guoquan
authors.initials: G
authors.lastname: Zhang
authors.forename: Jintao
authors.initials: J
authors.lastname: Bai