Charged excitons in individual quantum dots: effects of vertical electric fields and optical pump power

被引：7
|
作者：
Urbaszek, B [1 ]
McGhee, EJ
Smith, JM
Warburton, RJ
Karrai, K
Gerardot, BD
Garcia, JM
Petroff, PM
机构：
[1] Heriot Watt Univ, Dept Phys, Edinburgh EH14 4AS, Midlothian, Scotland
[2] Univ Munich, Ctr NanoSci, D-80539 Munich, Germany
[3] Univ Munich, Sekt Phys, D-80539 Munich, Germany
[4] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA
[5] Univ Calif Santa Barbara, QUEST, Santa Barbara, CA 93106 USA
[6] Inst Microelect Madrid, Madrid 28760, Spain
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2003年 / 17卷 / 1-4期
关键词：
quantum dots; electric field; excitons;
D O I：
10.1016/S1386-9477(02)00726-9
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We investigate the influence of optical pump power on a series of charging events of individual quantum dots embedded in a field effect structure. Increasing the optical pump powers moves all charging events towards more negative voltages and charged biexciton states in addition to single exciton states are observed. The linear shift in voltage with pump power is explained by the accumulation of photogenerated holes within the structure. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：35 / 36
页数：2
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