title: Gap solitons in parity-time complex periodic optical lattices with the real part of superlattices.
abstract: We report the existence and stability of gap solitons in parity-time (PT) complex periodic optical lattices with the real part of superlattices. These solitons can stably exist in the semi-infinite gap. We have studied the effects of different relative strengths of the superlattices and different amplitudes of the imaginary part on soliton propagation. It was found that the relative strength of the superlattices and the amplitude of the imaginary part significantly affect the PT symmetry and the stability of solitons in the PT complex periodic optical lattices.
authors.affiliation: Guangdong Engineering Research Center for Semiconductor Lighting, School of Science, South China University of Technology, Guangzhou 510640, China.
authors.forename: Xing
authors.initials: X
authors.lastname: Zhu
authors.forename: Hong
authors.initials: H
authors.lastname: Wang
authors.forename: Li-Xian
authors.initials: LX
authors.lastname: Zheng
authors.forename: Huagang
authors.initials: H
authors.lastname: Li
authors.forename: Ying-Ji
authors.initials: YJ
authors.lastname: He