A spin-polarized bi-exciton in a semiconductor quantum dot

被引：2

作者：

Korkusinski, Marek ^{[1
]}

Hawrylak, Pawel ^{[1
]}

Potemski, Marek ^{[2
]}

机构：

[1] Natl Res Council Canada, Inst Microstruct Sci, Quantum Theory Grp, Ottawa, ON K1A 0R6, Canada

[2] CNRS, Grenoble High Magnet Field Lab, Grenoble, France

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2008年 / 20卷 / 45期

关键词：

D O I：

10.1088/0953-8984/20/45/454213

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We discuss the role of spin-polarized multi-exciton complexes in the emission spectra of semiconductor quantum dots. The spin-polarized bi-exciton complex composed of two spin-polarized electrons and two spin-polarized holes confined in a single, parabolic, self-assembled quantum dot is discussed in detail. The configuration-interaction approach is used to compute the energies, wavefunctions, and emission spectra as a function of the magnetic field. It is shown that the spin-polarized bi-exciton emission spectrum differs from the unpolarized spectrum due to the Pauli blocking and exchange interactions. The emission from spin-polarized bi-exciton allows for the measurement of ground and excited single-exciton states, and its magnetic field dependence allows for the differentiation of the spin-polarized bi-exciton and tri-exciton spectrum.

引用

页数：5

共 8 条

[1] Hidden symmetries in the energy levels of excitonic 'artificial atoms'
Bayer, M
Stern, O
Hawrylak, P
Fafard, S
Forchel, A
[J]. NATURE, 2000, 405 (6789) : 923 - 926
[2] Electronic structure and optical properties of self-assembled quantum dots
Hawrylak, P
Wojs, A
[J]. SEMICONDUCTOR SCIENCE AND TECHNOLOGY, 1996, 11 (11) : 1516 - 1520
[3] Excitonic artificial atoms: Engineering optical properties of quantum dots
Hawrylak, P
[J]. PHYSICAL REVIEW B, 1999, 60 (08): : 5597 - 5608
[4] Jacak L., 1998, QUANTUM DOTS
[5] Electrical spin injection from an n-type ferromagnetic semiconductor into a III-V device heterostructure
Kioseoglou, G
Hanbicki, AT
Sullivan, JM
van 't Erve, OMJ
Li, CH
Erwin, SC
Mallory, R
Yasar, M
Petrou, A
Jonker, BT
[J]. NATURE MATERIALS, 2004, 3 (11) : 799 - 803
[6] Michler P, 2003, Topics in Applied Physics, V90
[7] Effects of electron-electron interactions on excitonic absorption in charged self-assembled quantum dots
Narvaez, GA
Hawrylak, P
[J]. PHYSICAL REVIEW B, 2000, 61 (20) : 13753 - 13762
[8] Control of photon polarization in GaAs/AlAs single quantum dot emission
Suffczynski, J.
Trajnerowicz, A.
Kazimierczuk, T.
Pietka, B.
Kowalik, K.
Kossacki, P.
Golnik, A.
Nawrocki, M.
Gaj, J. A.
Wysmolek, A.
Stepniewski, R.
Potemski, M.
Thierry-Mieg, V.
[J]. ACTA PHYSICA POLONICA A, 2007, 112 (02) : 461 - 466

← 1 →