基于一类无序PT势的光局域化  

Localization of Light based on a Disordered PT Potential

作　　者：王俊影 石智伟[1] 李扬 WANG Jun-ying;SHI Zhi-wei;LI Yang(School of Electro-mechanicai Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学机电工程学院,广州510006

出　　处：《量子光学学报》2020年第2期165-171,共7页Journal of Quantum Optics

基　　金：国家自然科学基金(11774068)。

摘　　要：本文基于非线性薛定谔方程并利用快速傅立叶变换的光束传输方法数值研究了一类无序势中的PT光局域化。通过比较实晶格与相应的PT对称晶格,可以发现实晶格中的有效光束束宽更宽。无序度越弱,光局域化的区域越长。此外,对于线性、聚焦和散焦非线性介质来说,聚焦非线性的有效束宽最小。In this paper,the PT optical localization in a class of disordered potentials is numerically studied based on the nonlinear Schrodinger equation and utilizing the Fast Fourier Transform of beam propagation quation.Comparing the real lattice with the corresponding PT-symmetric lattices,we find that the effective beam width is broader in the real lattice.The weaker the disorder level is the longer the localization regimeis.Moreover,the smallest effective beam width exists for focusing nonlinearity between linear,focusing and defocusing nonlinear media.

关 键 词：PT势 光局域化 有效束宽 无序势 

分 类 号：TN25[电子电信—物理电子学] O436[机械工程—光学工程]