Dynamical Instability of a Nonequilibrium Exciton-Polariton Condensate

被引：42

作者：

Bobrovska, Nataliya ^{[1
]}

Matuszewski, Michal ^{[1
]}

Daskalakis, Konstantinos S. ^{[2
]}

Maier, Stefan A. ^{[3
]}

Kena-Cohen, Stephane ^{[4
]}

机构：

[1] Polish Acad Sci, Inst Phys, Al Lotnikow 32-46, PL-02668 Warsaw, Poland

[2] Aalto Univ, Dept Appl Phys, COMP Ctr Excellence, POB 15100, FI-00076 Aalto, Finland

[3] Imperial Coll London, Dept Phys, London SW7 2AZ, England

[4] Polytech Montreal, Dept Engn Phys, Montreal, PQ H3C 3A7, Canada

来源：

ACS PHOTONICS | 2018年 / 5卷 / 01期

基金：

英国工程与自然科学研究理事会; 加拿大自然科学与工程研究理事会;

关键词：

exciton-polariton; Bose-Einstein condensation; organic condensate; dynamical instability;

D O I：

10.1021/acsphotonics.7b00283

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

By imaging single-shot realizations of an organic polariton quantum fluid, we observe the long-sought dynamical instability of nonequilibrium condensates. We find an excellent agreement between the experimental data and a numerical simulation of the open-dissipative Gross-Pitaevskii equation, without performing any parameter fitting, which allows us to draw several important conclusions about the physics of the system. We find that the reservoir dynamics are in the strongly nonadiabatic regime, which renders the complex Ginzburg-Landau description invalid. The observed transition from stable to unstable fluid can only be explained by taking into account the specific form of reservoir-mediated instability as well as particle currents induced by the finite extent of the pump spot.

引用

页码：111 / 118

页数：8

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