Systematic reduction of the permanent exciton dipole for charged excitons in individual self-assembled InGaAs quantum dots

J. J. Finley; M. Sabathil; R. Oulton; A. I. Tartakovskii; D. J. Mowbray; M. S. Skolnick; S. Liew; M. Migliorato; M. Hopkinson; P. Vogl

doi:10.1016/j.physe.2003.11.006

Systematic reduction of the permanent exciton dipole for charged excitons in individual self-assembled InGaAs quantum dots

J. J. Finley, M. Sabathil, R. Oulton, A. I. Tartakovskii, D. J. Mowbray, M. S. Skolnick, S. Liew, M. Migliorato, M. Hopkinson, P. Vogl

Research output: Contribution to journal › Conference article › peer-review

1 Scopus citations

Abstract

The nature of the few particle wavefunctions for neutral and positively charged excitons is probed in individual InGaAs quantum dots using Stark-effect perturbation spectroscopy. A systematic reduction of the vertical component of the permanent excitonic dipole (p_z) is observed as additional holes are added to the dot. A comparison with calculations reveals that this reduction (Δp_z/e∼15-20%) is accompanied by a significant lateral expansion of the hole (∼2 nm) and contraction (∼1 nm) of the electron wavefunctions. We suggest that this lateral redistribution of the charged exciton wavefunctions provides an optical means to probe the lateral composition profile of the dot.

Original language	English
Pages (from-to)	199-203
Number of pages	5
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	21
Issue number	2-4
DOIs	https://doi.org/10.1016/j.physe.2003.11.006
State	Published - Mar 2004
Event	Proceedings of the Eleventh International Conference on Modulation (MSS11) - Nara, Japan Duration: 14 Jul 2003 → 18 Jul 2003

Keywords

Charged excitons
Many-body wavefunctions
Single dot spectroscopy

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10.1016/j.physe.2003.11.006

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Finley, J. J., Sabathil, M., Oulton, R., Tartakovskii, A. I., Mowbray, D. J., Skolnick, M. S., Liew, S., Migliorato, M., Hopkinson, M., & Vogl, P. (2004). Systematic reduction of the permanent exciton dipole for charged excitons in individual self-assembled InGaAs quantum dots. Physica E: Low-Dimensional Systems and Nanostructures, 21(2-4), 199-203. https://doi.org/10.1016/j.physe.2003.11.006

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title = "Systematic reduction of the permanent exciton dipole for charged excitons in individual self-assembled InGaAs quantum dots",

abstract = "The nature of the few particle wavefunctions for neutral and positively charged excitons is probed in individual InGaAs quantum dots using Stark-effect perturbation spectroscopy. A systematic reduction of the vertical component of the permanent excitonic dipole (pz) is observed as additional holes are added to the dot. A comparison with calculations reveals that this reduction (Δpz/e∼15-20%) is accompanied by a significant lateral expansion of the hole (∼2 nm) and contraction (∼1 nm) of the electron wavefunctions. We suggest that this lateral redistribution of the charged exciton wavefunctions provides an optical means to probe the lateral composition profile of the dot.",

keywords = "Charged excitons, Many-body wavefunctions, Single dot spectroscopy",

author = "Finley, {J. J.} and M. Sabathil and R. Oulton and Tartakovskii, {A. I.} and Mowbray, {D. J.} and Skolnick, {M. S.} and S. Liew and M. Migliorato and M. Hopkinson and P. Vogl",

year = "2004",

month = mar,

doi = "10.1016/j.physe.2003.11.006",

language = "English",

volume = "21",

pages = "199--203",

journal = "Physica E: Low-Dimensional Systems and Nanostructures",

issn = "1386-9477",

publisher = "Elsevier",

number = "2-4",

note = "Proceedings of the Eleventh International Conference on Modulation (MSS11) ; Conference date: 14-07-2003 Through 18-07-2003",

}

Finley, JJ, Sabathil, M, Oulton, R, Tartakovskii, AI, Mowbray, DJ, Skolnick, MS, Liew, S, Migliorato, M, Hopkinson, M & Vogl, P 2004, 'Systematic reduction of the permanent exciton dipole for charged excitons in individual self-assembled InGaAs quantum dots', Physica E: Low-Dimensional Systems and Nanostructures, vol. 21, no. 2-4, pp. 199-203. https://doi.org/10.1016/j.physe.2003.11.006

TY - JOUR

T1 - Systematic reduction of the permanent exciton dipole for charged excitons in individual self-assembled InGaAs quantum dots

AU - Finley, J. J.

AU - Sabathil, M.

AU - Oulton, R.

AU - Tartakovskii, A. I.

AU - Mowbray, D. J.

AU - Skolnick, M. S.

AU - Liew, S.

AU - Migliorato, M.

AU - Hopkinson, M.

AU - Vogl, P.

PY - 2004/3

Y1 - 2004/3

N2 - The nature of the few particle wavefunctions for neutral and positively charged excitons is probed in individual InGaAs quantum dots using Stark-effect perturbation spectroscopy. A systematic reduction of the vertical component of the permanent excitonic dipole (pz) is observed as additional holes are added to the dot. A comparison with calculations reveals that this reduction (Δpz/e∼15-20%) is accompanied by a significant lateral expansion of the hole (∼2 nm) and contraction (∼1 nm) of the electron wavefunctions. We suggest that this lateral redistribution of the charged exciton wavefunctions provides an optical means to probe the lateral composition profile of the dot.

AB - The nature of the few particle wavefunctions for neutral and positively charged excitons is probed in individual InGaAs quantum dots using Stark-effect perturbation spectroscopy. A systematic reduction of the vertical component of the permanent excitonic dipole (pz) is observed as additional holes are added to the dot. A comparison with calculations reveals that this reduction (Δpz/e∼15-20%) is accompanied by a significant lateral expansion of the hole (∼2 nm) and contraction (∼1 nm) of the electron wavefunctions. We suggest that this lateral redistribution of the charged exciton wavefunctions provides an optical means to probe the lateral composition profile of the dot.

KW - Charged excitons

KW - Many-body wavefunctions

KW - Single dot spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=12144290593&partnerID=8YFLogxK

U2 - 10.1016/j.physe.2003.11.006

DO - 10.1016/j.physe.2003.11.006

M3 - Conference article

AN - SCOPUS:12144290593

SN - 1386-9477

VL - 21

SP - 199

EP - 203

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 2-4

T2 - Proceedings of the Eleventh International Conference on Modulation (MSS11)

Y2 - 14 July 2003 through 18 July 2003

ER -

Systematic reduction of the permanent exciton dipole for charged excitons in individual self-assembled InGaAs quantum dots

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