Excitation-polarization-dependent dynamics of polariton condensates in the ZnO microwire at room temperature

被引:5
作者
Ye, Ziyu [1 ]
Chen, Fei [1 ]
Zhou, Hang [2 ]
Luo, Song [2 ]
Sun, Fenghao [1 ]
Sun, Zheng [1 ]
Zheng, Yuanlin [3 ]
Chen, Xianfeng [3 ,4 ]
Xu, Huailiang [1 ]
Chen, Zhanghai [2 ]
Li, Hui [1 ]
Wu, Jian [1 ,5 ,6 ]
机构
[1] East China Normal Univ, State Key Lab Precis Spect, Shanghai 200241, Peoples R China
[2] Xiamen Univ, Coll Phys Sci & Technol, Dept Phys, Xiamen 361005, Peoples R China
[3] Shanghai Jiao Tong Univ, Sch Phys & Astron, State Key Lab Adv Opt Commun Syst & Networks, Shanghai 200240, Peoples R China
[4] Shandong Normal Univ, Collaborat Innovat Ctr Light Manipulat & Applicat, Jinan 250358, Peoples R China
[5] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China
[6] CAS Ctr Excellence Ultraintense Laser Sci, Shanghai 201800, Peoples R China
基金
国家重点研发计划;
关键词
exciton polariton; ultrafast dynamics; polarization-dependence; BOSE-EINSTEIN CONDENSATION; EXCITON; PHOTOLUMINESCENCE;
D O I
10.1088/1361-648X/ac5e04
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
Based on ZnO microcavities with high quality factors, where the gain medium exhibits confinement of wave packets due to the intrinsically formed whispering gallery microcavity, strong coupling between excitons and cavity photons can be obtained at room temperature resulting in hybrid quasiparticles, e.g. exciton polaritons. In this work, polariton condensation is induced under the non-resonant excitation by linearly polarized femtosecond laser pulses with different polarization directions. The dynamical angle-resolved k-space spectra of the photoluminescence emission of polariton condensates are measured with sub-picosecond resolution by the self-developed femtosecond angle-resolved spectroscopic imaging technique. Our results show that the ultrafast dynamics of polariton condensation is sensitive to the polarization direction of the excitation pulses which can be explained qualitatively by the combined effect of selective excitation of distinct exciton modes in the sample and the effective coupling strength of the excitation pulses in the ZnO microcavity for various polarization directions. This work strengthened the understanding of the condensation process for cavity exciton polaritons at room temperature.
引用
收藏
页数:7
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