Dephasing of excited-state excitons in InGaAs quantum dots

被引：6
作者：
Borri, P.
Langbein, W.
Muljarov, E. A.
Zimmermann, R.
机构：
[1] Cardiff Univ, Sch Biosci, Cardiff CF10 3US, S Glam, Wales
[2] Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3YB, S Glam, Wales
[3] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany
[4] AM Prokhorov Gen Phys Inst RAS, Moscow 119991, Russia
来源：
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2006年 / 243卷 / 15期
关键词：
D O I：
10.1002/pssb.200671516
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We measure the dephasing time of the first optically-active excited-state excitonic transition in strongly confined InGaAs quantum dots using transient four-wave mixing. The optically-driven excited-state polarization shows a bi-exponential decay with a significant fraction of the probed excited states exhibiting a very long dephasing time, in the nanosecond range at 10 K. The full time-dependent four-wave mixing polarization is microscopically calculated by taking into account both virtual and real acoustic phonon-assisted transitions. The bi-exponential decay is qualitatively explained by a model of two-bright excitonic excited states non-degenerate in the absence of in-plane cylindrical symmetry. (C) 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
引用
收藏
页码：3890 / 3894
页数：5
相关论文
共 12 条
[1]  
Bayer M, 2001, PHYS STATUS SOLIDI B, V224, P331, DOI 10.1002/1521-3951(200103)224:2<331::AID-PSSB331>3.0.CO
[2]  
2-A
[3]   Exciton dephasing via phonon interactions in InAs quantum dots: Dependence on quantum confinement [J].
Borri, P ;
Langbein, W ;
Woggon, U ;
Stavarache, V ;
Reuter, D ;
Wieck, AD .
PHYSICAL REVIEW B, 2005, 71 (11)
[4]   Ultralong dephasing time in InGaAs quantum dots [J].
Borri, P ;
Langbein, W ;
Schneider, S ;
Woggon, U ;
Sellin, RL ;
Ouyang, D ;
Bimberg, D .
PHYSICAL REVIEW LETTERS, 2001, 87 (15) :157401-157401
[5]   Carrier relaxation and quantum decoherence of excited states in self-assembled quantum dots [J].
Htoon, H ;
Kulik, D ;
Baklenov, O ;
Holmes, AL ;
Takagahara, T ;
Shih, CK .
PHYSICAL REVIEW B, 2001, 63 (24)
[6]   Radiatively limited dephasing in InAs quantum dots [J].
Langbein, W ;
Borri, P ;
Woggon, U ;
Stavarache, V ;
Reuter, D ;
Wieck, AD .
PHYSICAL REVIEW B, 2004, 70 (03) :033301-1
[7]   Nonlinear optical response and exciton dephasing in quantum dots [J].
Muljarov, E. A. ;
Zimmermann, R. .
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 2006, 243 (10) :2252-2256
[8]   Phonon-induced exciton dephasing in quantum dot molecules [J].
Muljarov, EA ;
Takagahara, T ;
Zimmermann, R .
PHYSICAL REVIEW LETTERS, 2005, 95 (17)
[9]   Dephasing in quantum dots: Quadratic coupling to acoustic phonons [J].
Muljarov, EA ;
Zimmermann, R .
PHYSICAL REVIEW LETTERS, 2004, 93 (23)
[10]   Coulomb-interaction-induced incomplete shell filling in the hole system of InAs quantum dots [J].
Reuter, D ;
Kailuweit, P ;
Wieck, AD ;
Zeitler, U ;
Wibbelhoff, O ;
Meier, C ;
Lorke, A ;
Maan, JC .
PHYSICAL REVIEW LETTERS, 2005, 94 (02)
12