Macroscopic Two-Dimensional Polariton Condensates

被引：42

作者：

Ballarini, Dario ^{[1
]}

Caputo, Davide ^{[1
,2
]}

Munoz, Carlos Sanchez ^{[3
]}

De Giorgi, Milena ^{[1
]}

Dominici, Lorenzo ^{[1
]}

Szymanska, Marzena H. ^{[4
]}

West, Kenneth ^{[5
]}

Pfeiffer, Loren N. ^{[5
]}

Gigli, Giuseppe ^{[1
,2
]}

Laussy, Fabrice P. ^{[6
,7
]}

Sanvitto, Daniele ^{[1
,8
]}

机构：

[1] CNR, NANOTEC Ist Nanotecnol, Via Monteroni, I-73100 Lecce, Italy

[2] Univ Salerno, Via Arnesano, I-73100 Lecce, Italy

[3] RIKEN, CEMS, Saitama 3510198, Japan

[4] UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England

[5] Princeton Univ, Princeton Inst Sci & Technol Mat, PRISM, Princeton, NJ 08540 USA

[6] Univ Wolverhampton, Fac Sci & Engn, Wulfruna St, Wolverhampton WV1 1LY, W Midlands, England

[7] Russian Quantum Ctr, Novaya 100, Skolkovo 143025, Moscow Region, Russia

[8] Ist Nazl Fis Nucl, Sez Lecce, I-73100 Lecce, Italy

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 118卷 / 21期

基金：

英国工程与自然科学研究理事会;

关键词：

BOSE-EINSTEIN CONDENSATION; MICROCAVITY POLARITONS; EXCITON-POLARITONS;

D O I：

10.1103/PhysRevLett.118.215301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a record-size, two-dimensional polariton condensate of a fraction of a millimeter radius free from the presence of an exciton reservoir. This macroscopically occupied state is formed by the ballistically expanding polariton flow that relaxes and condenses over a large area outside of the excitation spot. The density of this trap-free condensate is < 1 polariton /mu m(2), reducing the phase noise induced by the interaction energy. Moreover, the backflow effect, recently predicted for the nonparabolic polariton dispersion, is observed here for the first time in the fast-expanding wave packet.

引用

页数：5

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