Generation and Control of Shock Waves in Exciton-Polariton Condensates  

作　　者：王金玲 文文 林机 李慧军 Jin-Ling Wang;Wen Wen;Ji Lin;and Hui-Jun Li(Institute of Nonlinear Physics and Department of Physics,Zhejiang Normal University,Jinhua 321004,China;College of Science,Hohai University,Nanjing 210098,China)

机构地区：[1]Institute of Nonlinear Physics and Department of Physics,Zhejiang Normal University,Jinhua 321004,China [2]College of Science,Hohai University,Nanjing 210098,China

出　　处：《Chinese Physics Letters》2023年第7期6-12,共7页中国物理快报（英文版）

基　　金：supported by the Natural Science Foundation of Zhejiang Province of China(Grant No.LZ22A050002);the National Natural Science Foundation of China(Grant Nos.11835011 and 12074343)。

摘　　要：We propose a scheme to generate and control supersonic shock waves in a non-resonantly incoherent pumped exciton-polariton condensate,and different types of shock waves can be generated.Under conditions of different initial step waves,the ranges of parameters about various shock waves are determined by the initial incidence function and the cross-interaction between the polariton condensate and the reservoir.In addition,shock waves are successfully found by regulating the incoherent pump.In the case of low condensation rate from polariton to condensate,these results are similar to the classical nonlinear Schr¨odinger equation,and the effect of saturated nonlinearity resulted from cross interaction is equivalent to the self-interaction between polariton condensates.At high condensation rates,profiles of shock waves become symmetrical due to the saturated nonlinearity.Compared to the previous studies in which the shock wave can only be found in the system with repulsive self-interaction(defocusing nonlinearity),we not only discuss the shock wave in the exciton-polariton condensate system with the repulsive self-interaction,but also find the shock wave in the condensates system with attractive self-interaction.Our proposal may provide a simple way to generate and control shock waves in non-resonantly pumped excitonpolariton systems.

关 键 词：interaction. shock saturated 

分 类 号：O469[理学—凝聚态物理]