Multi-excitons in self-assembled InAs/GaAs quantum dots: A pseudopotential, many-body approach

被引：32

作者：

Williamson, AJ ^{[1
]}

Franceschetti, A ^{[1
]}

Zunger, A ^{[1
]}

机构：

[1] Natl Renewable Energy Lab, Golden, CO 80401 USA

来源：

EUROPHYSICS LETTERS | 2001年 / 53卷 / 01期

关键词：

D O I：

10.1209/epl/i2001-00123-2

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We use a many-body, atomistic empirical pseudopotential approach to predict the multi-exciton emission spectrum of a lens-shaped InAs/GaAs self-assembled quantum dot. We discuss the effects of i) the direct Coulomb energies, including the differences of electron and hole wave functions; ii) the exchange Coulomb energies and iii) correlation energies given by a configuration interaction calculation. Emission from the ground state of the N exciton system to the N - 1 exciton system involving e(0) --> h(0) and e(1) --> h(1) recombinations are discussed. A comparison with a simpler single-band, effective mass approach is presented.

引用

收藏

页码：59 / 65

页数：7

相关论文

共 14 条

[1] Coulomb correlation and band gap renormalization at high carrier densities in quantum wires [J].

Ambigapathy, R ;

BarJoseph, I ;

Oberli, DY ;

Haacke, S ;

Brasil, MJ ;

Reinhardt, F ;

Kapon, E ;

Deveaud, B .

PHYSICAL REVIEW LETTERS, 1997, 78 (18) :3579-3582

[2] QUANTUM MANY-BODY STATES OF EXCITONS IN A SMALL QUANTUM-DOT [J].

BARENCO, A ;

DUPERTUIS, MA .

PHYSICAL REVIEW B, 1995, 52 (04) :2766-2778

[3] 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

[4] SPECTROSCOPY OF QUANTUM LEVELS IN CHARGE-TUNABLE INGAAS QUANTUM DOTS [J].

DREXLER, H ;

LEONARD, D ;

HANSEN, W ;

KOTTHAUS, JP ;

PETROFF, PM .

PHYSICAL REVIEW LETTERS, 1994, 73 (16) :2252-2255

[5] Short-range versus long-range electron-hole exchange interactions in semiconductor quantum dots [J].

Franceschetti, A ;

Wang, LW ;

Fu, H ;

Zunger, A .

PHYSICAL REVIEW B, 1998, 58 (20) :13367-13370

[6] Many-body pseudopotential theory of excitons in InP and CdSe quantum dots [J].

Franceschetti, A ;

Fu, H ;

Wang, LW ;

Zunger, A .

PHYSICAL REVIEW B, 1999, 60 (03) :1819-1829

[7] Excitonic artificial atoms: Engineering optical properties of quantum dots [J].

Hawrylak, P .

PHYSICAL REVIEW B, 1999, 60 (08) :5597-5608

[8] Optical investigations of individual InAs quantum dots: Level splittings of exciton complexes [J].

Landin, L ;

Pistol, ME ;

Pryor, C ;

Persson, M ;

Samuelson, L ;

Miller, M .

PHYSICAL REVIEW B, 1999, 60 (24) :16640-16646

[9] Determination of the shape of self-organized InAs/GaAs quantum dots by reflection high energy electron diffraction [J].

Lee, H ;

Lowe-Webb, R ;

Yang, WD ;

Sercel, PC .

APPLIED PHYSICS LETTERS, 1998, 72 (07) :812-814

[10]

SHUMWAY J, UNPUB