Radiative lifetimes of single excitons in semiconductor quantum dots - manifestation of the spatial coherence effect

被引：38
作者：
Dekel, E
Regelman, DV
Gershoni, D [1 ]
Ehrenfreund, E
Schoenfeld, WV
Petroff, PM
机构：
[1] Technion Israel Inst Technol, Dept Phys, Inst Solid State, IL-32000 Haifa, Israel
[2] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA
来源：
SOLID STATE COMMUNICATIONS | 2001年 / 117卷 / 07期
基金：
以色列科学基金会;
关键词：
semiconductor; nanostructures; electron-electron interactions; luminescence; time resolved optical spectroscopies;
D O I：
10.1016/S0038-1098(00)00483-X
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Using time correlated single photon counting combined with temperature dependent diffraction limited confocal photoluminescence spectroscopy we accurately determine, for the first time, the intrinsic radiative lifetime of single excitons confined within semiconductor quantum dots. Their lifetime is one (two) orders of magnitude longer than the intrinsic radiative lifetime of single excitons confined in semiconductor quantum wires (wells) of comparable confining dimensions. We quantitatively explain this long radiative time in terms of the reduced spatial coherence between the confined exciton dipole moment and the: radiation electromagnetic field. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：395 / 400
页数：6
相关论文
共 15 条
[1]   RADIATIVE LIFETIME OF FREE-EXCITONS IN QUANTUM-WELLS [J].
ANDREANI, LC ;
TASSONE, F ;
BASSANI, F .
SOLID STATE COMMUNICATIONS, 1991, 77 (09) :641-645
[2]   Quantum-size effects on radiative lifetimes and relaxation of excitons in semiconductor nanostructures [J].
Bellessa, J ;
Voliotis, V ;
Grousson, R ;
Wang, XL ;
Ogura, M ;
Matsuhata, H .
PHYSICAL REVIEW B, 1998, 58 (15) :9933-9940
[3]   Time resolved spectroscopy of single quantum dots: Fermi gas of excitons? [J].
Bockelmann, U ;
Roussignol, P ;
Filoramo, A ;
Heller, W ;
Abstreiter, G ;
Brunner, K ;
Bohm, G ;
Weimann, G .
PHYSICAL REVIEW LETTERS, 1996, 76 (19) :3622-3625
[4]   RADIATIVE LIFETIMES OF EXCITONS IN SEMICONDUCTOR QUANTUM DOTS [J].
CITRIN, DS .
SUPERLATTICES AND MICROSTRUCTURES, 1993, 13 (03) :303-308
[5]   Carrier-carrier correlations in an optically excited single semiconductor quantum dot [J].
Dekel, E ;
Gershoni, D ;
Ehrenfreund, E ;
Garcia, JM ;
Petroff, PM .
PHYSICAL REVIEW B, 2000, 61 (16) :11009-11020
[6]   Multiexciton spectroscopy of a single self-assembled quantum dot [J].
Dekel, E ;
Gershoni, D ;
Ehrenfreund, E ;
Spektor, D ;
Garcia, JM ;
Petroff, PM .
PHYSICAL REVIEW LETTERS, 1998, 80 (22) :4991-4994
[7]   Cascade evolution and radiative recombination of quantum dot multiexcitons studied by time-resolved spectroscopy [J].
Dekel, E ;
Regelman, DV ;
Gershoni, D ;
Ehrenfreund, E ;
Schoenfeld, WV ;
Petroff, PM .
PHYSICAL REVIEW B, 2000, 62 (16) :11038-11045
[8]  
DEVAUD B, 1991, PHYS REV LETT, V67, P2355
[9]   LINEWIDTH DEPENDENCE OF RADIATIVE EXCITON LIFETIMES IN QUANTUM-WELLS [J].
FELDMANN, J ;
PETER, G ;
GOBEL, EO ;
DAWSON, P ;
MOORE, K ;
FOXON, C ;
ELLIOTT, RJ .
PHYSICAL REVIEW LETTERS, 1987, 59 (20) :2337-2340
[10]  
Garcia JM, 1998, APPL PHYS LETT, V72, P3172, DOI 10.1063/1.121583
12