Adiabatic preparation of a cold exciton condensate

被引：9

作者：

Shahnazaryan, V. ^{[1
,2
]}

Kyriienko, O. ^{[1
,3
,4
]}

Shelykh, I. A. ^{[1
,3
]}

机构：

[1] Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland

[2] Russian Armenian Slavon Univ, Inst Math & High Technol, Yerevan 0051, Armenia

[3] Nanyang Technol Univ, Div Phys & Appl Phys, Singapore 637371, Singapore

[4] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark

来源：

PHYSICAL REVIEW B | 2015年 / 91卷 / 08期

关键词：

BOSE-EINSTEIN CONDENSATION; STATE; VORTICES; GAS;

D O I：

10.1103/PhysRevB.91.085302

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We propose a scheme for the controllable preparation of a cold indirect exciton condensate using dipolaritonic setup with an optical pumping. Dipolaritons are bosonic quasiparticles which arise from the coupling between cavity photon (C), direct exciton (DX), and indirect exciton (IX) modes and appear in a double quantum well embedded in a semiconductor microcavity. Controlling the detuning between modes of the system, the limiting cases of exciton polaritons and indirect excitons can be realized. Our protocol relies on the initial preparation of an exciton polariton condensate for the far blue-detuned IX mode, with its subsequent adiabatic transformation to an indirect exciton condensate by lowering IX energy via applied electric field. The following allows for generation of a spatially localized cold exciton gas, on the contrary to currently used methods, where IX cloud appears due to diffusion of carriers from spatially separated electron-and hole-rich areas.

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页数：8

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