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 › Article › peer-review

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. © 2003 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	199-203
Number of pages	4
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
Publication status	Published - Mar 2004

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. {\textcopyright} 2003 Elsevier B.V. All rights reserved.",

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",

note = "Times Cited: 1 11th International Conference on Modulated Semiconductor Structures (MSS11) JUL 14-18, 2003 Nara, JAPAN",

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",

publisher = "Elsevier BV",

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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.

N1 - Times Cited: 1 11th International Conference on Modulated Semiconductor Structures (MSS11) JUL 14-18, 2003 Nara, JAPAN

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. © 2003 Elsevier B.V. All rights reserved.

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. © 2003 Elsevier B.V. All rights reserved.

KW - Charged excitons

KW - Many-body wavefunctions

KW - Single dot spectroscopy

U2 - 10.1016/j.physe.2003.11.006

DO - 10.1016/j.physe.2003.11.006

M3 - Article

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

ER -

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

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Keywords

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