Modulational instability of a resonantly polariton condensate in discrete lattices

doi:10.1088/1674-1056/ac891a

中国物理B ›› 2023, Vol. 32 ›› Issue (3): 30502-030502.doi: 10.1088/1674-1056/ac891a

Modulational instability of a resonantly polariton condensate in discrete lattices

Wei Qi(漆伟)^†, Xiao-Gang Guo(郭晓刚), Liang-Wei Dong(董亮伟), and Xiao-Fei Zhang(张晓斐)

Department of Physics, Shaanxi University of Science and Technology, Xi'an 710021, China

收稿日期:2022-05-18 修回日期:2022-07-04 接受日期:2022-08-12 出版日期:2023-02-14 发布日期:2023-02-14
通讯作者: Wei Qi E-mail:qiwei@sust.edu.cn
基金资助:
This work was partly supported by the National Natural Science Foundation of China (Grant No. 11805116), and the Natural Science Basic Research Plan in Shaanxi Province, China (Grant No. 2023-JC-YB-037).

Modulational instability of a resonantly polariton condensate in discrete lattices

Wei Qi(漆伟)^†, Xiao-Gang Guo(郭晓刚), Liang-Wei Dong(董亮伟), and Xiao-Fei Zhang(张晓斐)

Department of Physics, Shaanxi University of Science and Technology, Xi'an 710021, China

Received:2022-05-18 Revised:2022-07-04 Accepted:2022-08-12 Online:2023-02-14 Published:2023-02-14
Contact: Wei Qi E-mail:qiwei@sust.edu.cn
Supported by:
This work was partly supported by the National Natural Science Foundation of China (Grant No. 11805116), and the Natural Science Basic Research Plan in Shaanxi Province, China (Grant No. 2023-JC-YB-037).

摘要/Abstract

摘要： We study modulational instability of a resonantly polariton condensate in a discrete lattice. Employing a discrete gain-saturation model, we derive the dispersion relation for the modulational instability by means of the linear-stability analysis. Effects of the pumping strength, the nonlinearity, the strength of the detuning, and the coupling strength on the modulation instability are investigated. It is found that the interplay between these parameters will dramatically change the modulational instability condition. We believe that the predicted results in this work can be useful for future possible experiment of exciton-polariton condensate in lattices.

关键词: modulational instability, polariton condensate, discrete lattices

Abstract: We study modulational instability of a resonantly polariton condensate in a discrete lattice. Employing a discrete gain-saturation model, we derive the dispersion relation for the modulational instability by means of the linear-stability analysis. Effects of the pumping strength, the nonlinearity, the strength of the detuning, and the coupling strength on the modulation instability are investigated. It is found that the interplay between these parameters will dramatically change the modulational instability condition. We believe that the predicted results in this work can be useful for future possible experiment of exciton-polariton condensate in lattices.

Key words: modulational instability, polariton condensate, discrete lattices

中图分类号: (Solitons)

05.45.Yv

67.85.Hj (Bose-Einstein condensates in optical potentials) 42.65.Tg (Optical solitons; nonlinear guided waves)

Wei Qi(漆伟), Xiao-Gang Guo(郭晓刚), Liang-Wei Dong(董亮伟), and Xiao-Fei Zhang(张晓斐). Modulational instability of a resonantly polariton condensate in discrete lattices[J]. 中国物理B, 2023, 32(3): 30502-030502.

Wei Qi(漆伟), Xiao-Gang Guo(郭晓刚), Liang-Wei Dong(董亮伟), and Xiao-Fei Zhang(张晓斐). Modulational instability of a resonantly polariton condensate in discrete lattices[J]. Chin. Phys. B, 2023, 32(3): 30502-030502.

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Modulational instability of a resonantly polariton condensate in discrete lattices

Modulational instability of a resonantly polariton condensate in discrete lattices

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