Existence of a phonon bottleneck for excitons in quantum dots

被引：127

作者：

Heitz, R ^{[1
]}

Born, H ^{[1
]}

Guffarth, F ^{[1
]}

Stier, O ^{[1
]}

Schliwa, A ^{[1
]}

Hoffmann, A ^{[1
]}

Bimberg, D ^{[1
]}

机构：

[1] Tech Univ Berlin, Inst Festkorperphys, Sekr PN 5 2, D-10623 Berlin, Germany

来源：

PHYSICAL REVIEW B | 2001年 / 64卷 / 24期

关键词：

D O I：

10.1103/PhysRevB.64.241305

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A phonon bottleneck is manifested for correlated electron/hole (exciton) states in self-organized InxGa1-xAs/GaAs quantum dots (QD's) with a flat, truncated shape. Suppressed relaxation and hot luminescence from excited states in the low-density regime are demonstrated. The long low-temperature relaxation time of similar to 7.7 ns, being similar to 15 times the radiative lifetime, is attributed to a quenched polar exciton-LO-phonon coupling in truncated QD's based on eight-band k . p model calculations.

引用

页数：4

共 28 条

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