Vortex Chain in a Resonantly Pumped Polariton Superfluid

被引：38

作者：

Boulier, T. ^{[1
]}

Tercas, H. ^{[2
]}

Solnyshkov, D. D. ^{[2
]}

Glorieux, Q. ^{[1
]}

Giacobino, E. ^{[1
]}

Malpuech, G. ^{[2
]}

Bramati, A. ^{[1
]}

机构：

[1] ENS PSL Res Univ, UPMC Sorbonne Univ, Coll France, Lab Kastler Brossel,CNRS, F-75005 Paris, France

[2] Univ Blaise Pascal, Univ Clermont Auvergne, Inst Pascal, PHOTON N2,CNRS, F-63177 Aubiere, France

来源：

SCIENTIFIC REPORTS | 2015年 / 5卷

关键词：

BOSE-EINSTEIN CONDENSATION; ANGULAR-MOMENTUM; VORTICES;

D O I：

10.1038/srep09230

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Exciton-polaritons are light-matter mixed states interacting via their exciton fraction. They can be excited, manipulated, and detected using all the versatile techniques of modern optics. An exciton-polariton gas is therefore a unique platform to study out-of-equilibrium interacting quantum fluids. In this work, we report the formation of a ring-shaped array of same sign vortices after injection of angular momentum in a polariton superfluid. The angular momentum is injected by a l = 8 Laguerre-Gauss beam. In the linear regime, a spiral interference pattern containing phase defects is visible. In the nonlinear (superfluid) regime, the interference disappears and eight vortices appear, minimizing the energy while conserving the quantized angular momentum. The radial position of the vortices evolves in the region between the two pumps as a function of the density. Hydrodynamic instabilities resulting in the spontaneous nucleation of vortex-antivortex pairs when the system size is sufficiently large confirm that the vortices are not constrained by interference when nonlinearities dominate the system.

引用

页数：5

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