Observation of Half-Quantum Vortices in an Exciton-Polariton Condensate

被引：274

作者：

Lagoudakis, K. G. ^{[1
]}

Ostatnicky, T. ^{[2
]}

Kavokin, A. V. ^{[2
,3
]}

Rubo, Y. G. ^{[4
]}

Andre, R. ^{[5
]}

Deveaud-Pledran, B. ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, IPEQ, CH-1015 Lausanne, Switzerland

[2] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England

[3] Univ Roma Tor Vergata, Marie Curie Chair Excellence, I-00133 Rome, Italy

[4] Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, Mexico

[5] CNRS, Inst Neel, F-38042 Grenoble, France

来源：

SCIENCE | 2009年 / 326卷 / 5955期

基金：

英国工程与自然科学研究理事会; 瑞士国家科学基金会;

关键词：

BOSE-EINSTEIN CONDENSATION; QUANTIZED VORTICES; POLARIZATION; LIGHT;

D O I：

10.1126/science.1177980

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：

Singly quantized vortices have already been observed in many systems, including the superfluid helium, Bose-Einstein condensates of dilute atomic gases, and condensates of exciton-polaritons in the solid state. Two-dimensional superfluids carrying spin are expected to demonstrate a different type of elementary excitations referred to as half-quantum vortices, characterized by a p rotation of the phase and a p rotation of the polarization vector when circumventing the vortex core. We detect half-quantum vortices in an exciton-polariton condensate by means of polarization-resolved interferometry, real-space spectroscopy, and phase imaging. Half-quantum vortices coexist with single-quantum vortices in our sample.

引用

页码：974 / 976

页数：3

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