Formation of an exciton polariton condensate:: Thermodynamic versus kinetic regimes

被引：159
|
作者：
Kasprzak, J. [1 ,2 ,3 ]
Solnyshkov, D. D. [4 ]
Andre, R. [1 ,2 ]
Dang, Le Si [1 ,2 ]
Malpuech, G. [4 ]
机构：
[1] CNRS, Inst Neel, CEA, Grp Nanophys & Semicond, F-38042 Grenoble 9, France
[2] Univ Grenoble 1, F-38042 Grenoble 9, France
[3] Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, S Glam, Wales
[4] Univ Blaise Pascal, CNRS, LASMEA, F-63177 Aubiere, France
来源：
PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 14期
基金：
英国工程与自然科学研究理事会;
关键词：
D O I：
10.1103/PhysRevLett.101.146404
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We measure the polariton distribution function and the condensation threshold versus the photon-exciton detuning and the lattice temperature in a CdTe microcavity under nonresonant pumping. The results are reproduced by simulations using semiclassical Boltzmann equations. At negative detuning we find a kinetic condensation regime: the distribution is not thermal and the threshold is governed by the relaxation kinetics. At positive detuning, the distribution becomes thermal and the threshold is governed by the thermodynamic parameters of the system. Both regimes are a manifestation of polariton lasing, whereas only the latter is related to Bose-Einstein condensation defined as an equilibrium phase transition.
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页数：4
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