Phonon-assisted transitions from quantum dot excitons to cavity photons

被引：103

作者：

Hohenester, Ulrich ^{[1
]}

Laucht, Arne ^{[2
]}

Kaniber, Michael ^{[2
]}

Hauke, Norman ^{[2
]}

Neumann, Andre ^{[2
]}

Mohtashami, Abbas ^{[2
]}

Seliger, Marek ^{[1
]}

Bichler, Max ^{[2
]}

Finley, Jonathan J. ^{[2
]}

机构：

[1] Karl Franzens Univ Graz, Inst Phys, A-8010 Graz, Austria

[2] Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 20期

关键词：

SYSTEM; MICROCAVITY; BOXES;

D O I：

10.1103/PhysRevB.80.201311

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

For a single semiconductor quantum dot embedded in a microcavity, we theoretically and experimentally investigate phonon-assisted transitions between excitons and the cavity mode. Within the framework of the independent boson model we find that such transitions can be very efficient, even for relatively large exciton-cavity detunings of several millielectron volts. Furthermore, we predict a strong detuning asymmetry for the exciton lifetime that vanishes for elevated lattice temperature. Our findings are corroborated by experiment, which turns out to be in good quantitative and qualitative agreement with theory.

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页数：4

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