Excitonic behavior in self-assembled InAs/GaAs quantum rings in high magnetic fields

被引：24

作者：

Kleemans, N. A. J. M. ^{[1
]}

Blokland, J. H. ^{[2
]}

Taboada, A. G. ^{[3
]}

van Genuchten, H. C. M. ^{[1
]}

Bozkurt, M. ^{[1
]}

Fomin, V. M. ^{[1
,4
,5
]}

Gladilin, V. N. ^{[4
,5
]}

Granados, D. ^{[3
]}

Garcia, J. M. ^{[3
]}

Christianen, P. C. M. ^{[2
]}

Maan, J. C. ^{[2
]}

Devreese, J. T. ^{[1
,4
]}

Koenraad, P. M. ^{[1
]}

机构：

[1] Eindhoven Univ Technol, COBRA, PSN, NL-5600 MB Eindhoven, Netherlands

[2] Radboud Univ Nijmegen, IMM, HFML, NL-6525 ED Nijmegen, Netherlands

[3] Inst Microelect Madrid, CSIC, E-28760 Tres Cantos, Spain

[4] Univ Antwerp, TFVS, B-2020 Antwerp, Belgium

[5] Univ Stat Moldova, FSM, Kishinev, Moldova

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 15期

关键词：

DOTS; NANOSTRUCTURES; ELECTRON;

D O I：

10.1103/PhysRevB.80.155318

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the exciton energy level structure of a large ensemble of InAs/GaAs quantum rings by photoluminescence spectroscopy in magnetic fields up to 30 T for different excitation densities. The confinement of an electron and a hole in these type I quantum rings along with the Coulomb interaction suppress the excitonic Aharonov-Bohm effect. We show that the exciton energy levels are nonequidistant and split up in only two levels in magnetic field, reflecting the ringlike geometry. A model, based on realistic parameters of the self-assembled quantum rings, allows us to interpret the essential features of the observed PL spectra in terms of the calculated optical transition probabilities.

引用

页数：4

共 31 条

[1] SIGNIFICANCE OF ELECTROMAGNETIC POTENTIALS IN THE QUANTUM THEORY [J].

AHARONOV, Y ;

BOHM, D .

PHYSICAL REVIEW, 1959, 115 (03) :485-491

[2] Continuum and discrete excitation spectrum of single quantum rings -: art. no. 155331 [J].

Alén, B ;

Martínez-Pastor, J ;

Granados, D ;

García, JM .

PHYSICAL REVIEW B, 2005, 72 (15)

[3] Single-exciton energy shell structure in InAs/GaAs quantum dots [J].

Awirothananon, S. ;

Raymond, S. ;

Studenikin, S. ;

Vachon, M. ;

Render, W. ;

Sachrajda, A. ;

Wu, X. ;

Babinski, A. ;

Potemski, M. ;

Fafard, S. ;

Cheng, S. J. ;

Korkusinski, M. ;

Hawrylak, P. .

PHYSICAL REVIEW B, 2008, 78 (23)

[4] Emission from a highly excited single InAs-GaAs quantum dot in magnetic fields: An excitonic Fock-Darwin diagram [J].

Babinski, A. ;

Potemski, M. ;

Raymond, S. ;

Lapointe, J. ;

Wasilewski, Z. R. .

PHYSICAL REVIEW B, 2006, 74 (15)

[5] Optical detection of the Aharonov-Bohm effect on a charged particle in a nanoscale quantum ring [J].

Bayer, M ;

Korkusinski, M ;

Hawrylak, P ;

Gutbrod, T ;

Michel, M ;

Forchel, A .

PHYSICAL REVIEW LETTERS, 2003, 90 (18) :4-186801

[6] Hidden symmetries in the energy levels of excitonic 'artificial atoms' [J].

Bayer, M ;

Stern, O ;

Hawrylak, P ;

Fafard, S ;

Forchel, A .

NATURE, 2000, 405 (6789) :923-926

[7] Hole levels in InAs self-assembled quantum dots [J].

Blokland, J. H. ;

Wijnen, F. J. P. ;

Christianen, P. C. M. ;

Zeitler, U. ;

Maan, J. C. .

PHYSICAL REVIEW B, 2007, 75 (23)

[8] Magneto-optical transitions in nanoscopic rings -: art. no. 075307 [J].

Climente, JI ;

Planelles, J ;

Jaskólski, W .

PHYSICAL REVIEW B, 2003, 68 (07)

[9]

Darwin CG, 1931, P CAMB PHILOS SOC, V27, P86

[10] Note to the Quantification of the harmonic Oscillator in a Magnetic Field [J].

Fock, V. .

ZEITSCHRIFT FUR PHYSIK, 1928, 47 (5-6) :446-448

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