Relaxation Oscillations of an Exciton-polariton Condensate Driven by Parametric Scattering
Abstract
We report observation of coherent oscillations in the relaxation dynamics of an exciton-polariton condensate driven by parametric scattering processes. As a result of the interbranch scattering scheme and the nonlinear polariton-polariton interactions, such parametric scatterings exhibit high scattering efficiency, which leads to fast depletion of the polariton condensate and periodic shut-off of the bosonic stimulation processes, eventually causing relaxation oscillations. Employing polariton-reservoir interactions, the oscillation dynamics in the time domain can be projected onto the energy space. In theory, our simulations using the open-dissipative Gross-Pitaevskii equation are in excellent agreement with experimental observations. Surprisingly, the oscillation patterns are clearly visible in our time-integrated images including many excitation pulses, implying the high stability of the relaxation oscillations driven by polariton parametric scatterings.
Keywords
Cite
@article{arxiv.2201.07585,
title = {Relaxation Oscillations of an Exciton-polariton Condensate Driven by Parametric Scattering},
author = {Chuan Tian and Linqi Chen and Yingjun Zhang and Liqing Zhu and Wenping Hu and Yichun Pan and Zheng Wang and Fangxin Zhang and Long Zhang and Hongxing Dong and Weihang Zhou},
journal= {arXiv preprint arXiv:2201.07585},
year = {2022}
}