Radiative recombination of excitons in disk-shaped InAs/InP quantum dots

被引：17
|
作者：
Tomimoto, Shinichi [1 ]
Kurokawa, Atsushi
Sakuma, Yoshiki
Usuki, Tatsuya
Masumoto, Yasuaki
机构：
[1] Univ Tsukuba, Inst Phys, Tsukuba, Ibaraki 3058571, Japan
[2] Univ Tsukuba, Ctr Tsukuba Adv Res Alliance TARA, Tsukuba, Ibaraki 3058571, Japan
[3] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan
[4] Fujitsu Labs Ltd, Atsugi, Kanagawa 2430197, Japan
来源：
PHYSICAL REVIEW B | 2007年 / 76卷 / 20期
关键词：
D O I：
10.1103/PhysRevB.76.205317
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Recombination dynamics of excitons confined in disk-shaped InAs/InP quantum dots is studied by time-resolved photoluminescence measurements. By comparing the result with that in a homologous ultrathin quantum well, it is revealed that the lateral confinement of excitons suppresses the thermal variation of the radiative recombination lifetime. The oscillator strength of the radiative transition is reduced with the decrease of the disk height, which is attributed to the increasing tunneling into the InP barrier of the exciton wave function.
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页数：5
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