Dr. Jingzhen Li

We produce families of two-dimensional gap solitons (GSs) maintained by moiré lattices (MLs) composed of linear and nonlinear sublattices, with the defocusing sign of the nonlinearity. Depending on the angle between the sublattices, the ML may be quasiperiodic or periodic, composed of mutually incommensurate or commensurate sublattices, respectively (in the latter case, the inter-lattice angle corresponds to Pythagorean triples). The GSs include fundamental, quadrupole, and octupole solitons, as well as quadrupoles and octupoles carrying unitary vorticity. Stability segments of the GS families are identified by means of the linearized equation for small perturbations, and confirmed by direct simulations of perturbed evolution.

30 April 2021 in Optics Letters

Journal Article

Localized modes and dark solitons sustained by nonlinear defects

Xiaowei Lu

Dark solitons and localized defect modes against periodic backgrounds are considered in arrays of waveguides with defocusing Kerr nonlinearity, constituting a nonlinear lattice. Bright defect modes are supported by a local increase in nonlinearity, while dark defect modes are supported by a local decrease in nonlinearity. Dark solitons exist for both types of defects, although in the case of weak nonlinearity, they feature side bright humps, making the total energy propagating through the system larger than the energy transferred by the constant background. All considered defect modes are found stable. Dark solitons are characterized by relatively narrow windows of stability. Interactions of unstable dark solitons with bright and dark modes are described.

30 April 2021 in Nonlinear Dynamics

Journal Article

Bubbles and W-shaped solitons in Kerr media with fractional diffraction

Liangwei Zeng

Boris Malomed

Dumitru Mihalache

Yi Cai

Xiaowei Lu

Jingzhen Li

About Me

Jingzhen Li graduated from Tsinghua University and transferred from the Xi’an Institute of Optics and Precision Mechanics at Academia Sinica to Shenzhen University in 1994. He is a professor at Shenzhen University. He has been the vice president of the Committee for Optical Testing of COS and the vice president of the Committee for High-Speed Photography and Photonics of COS. He has been studying high-speed imaging and photonics for a long time. His main research interests currently include extreme-high-speed imaging with tubeless rotating mirror cameras and especially, all-optical ultrafast imaging. So far, he has published more than 200 papers and 10 books about optics, lasers, and high-speed imaging and has won six state-level science and technology awards and twelve provincial and ministerial science and technology awards in China.

Dr. Jingzhen Li

Dr. Jingzhen Li

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