Effect of thermal annealing and strain engineering on the fine structure of quantum dot excitons

A. I. Tartakovskii; M. N. Makhonin; I. R. Sellers; J. Cahill; A. D. Andreev; D. M. Whittaker; J. P.R. Wells; A. M. Fox; D. J. Mowbray; M. S. Skolnick; K. M. Groom; M. J. Steer; H. Y. Liu; M. Hopkinson

doi:10.1103/PhysRevB.70.193303

Effect of thermal annealing and strain engineering on the fine structure of quantum dot excitons

A. I. Tartakovskii
, M. N. Makhonin
, I. R. Sellers
, J. Cahill
, A. D. Andreev
, D. M. Whittaker
, J. P.R. Wells
, A. M. Fox
, D. J. Mowbray
, M. S. Skolnick
, K. M. Groom
, M. J. Steer
, H. Y. Liu
, M. Hopkinson

Department of Electrical Engineering

University of Sheffield
Russian Academy of Sciences
University of Surrey

Research output: Contribution to journal › Article › peer-review

82 Scopus citations

Abstract

The fine structure splitting of bright exciton states is measured for a range of thermally annealed InGaAs quantum dot (QD) samples with differing degrees of In/Ga intermixing and also for a dot-in-a-well (DWELL) structure. Magnitudes of the fine structure splitting are determined in polarization-resolved differential transmission experiments from measurements of the period of quantum beats observed in QD exciton dynamics. The splitting is found to decrease in structures with weaker strain: both for In/Ga intermixed QD's and also in dots surrounded by strain-reducing layers (DWELL's). Our findings pave the way to the achievement of entangled two photon sources based on emission from individual QD's, currently prevented since the fine structure splitting is larger than the radiative linewidth.

Original language	English
Article number	193303
Pages (from-to)	1-4
Number of pages	4
Journal	Physical Review B-Condensed Matter
Volume	70
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevB.70.193303
State	Published - Nov 2004

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10.1103/PhysRevB.70.193303

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Tartakovskii, A. I., Makhonin, M. N., Sellers, I. R., Cahill, J., Andreev, A. D., Whittaker, D. M., Wells, J. P. R., Fox, A. M., Mowbray, D. J., Skolnick, M. S., Groom, K. M., Steer, M. J., Liu, H. Y., & Hopkinson, M. (2004). Effect of thermal annealing and strain engineering on the fine structure of quantum dot excitons. Physical Review B-Condensed Matter, 70(19), 1-4. Article 193303. https://doi.org/10.1103/PhysRevB.70.193303

@article{014a7f2a5ace4b15ae1f31f46e3f572a,

title = "Effect of thermal annealing and strain engineering on the fine structure of quantum dot excitons",

abstract = "The fine structure splitting of bright exciton states is measured for a range of thermally annealed InGaAs quantum dot (QD) samples with differing degrees of In/Ga intermixing and also for a dot-in-a-well (DWELL) structure. Magnitudes of the fine structure splitting are determined in polarization-resolved differential transmission experiments from measurements of the period of quantum beats observed in QD exciton dynamics. The splitting is found to decrease in structures with weaker strain: both for In/Ga intermixed QD's and also in dots surrounded by strain-reducing layers (DWELL's). Our findings pave the way to the achievement of entangled two photon sources based on emission from individual QD's, currently prevented since the fine structure splitting is larger than the radiative linewidth.",

author = "Tartakovskii, \{A. I.\} and Makhonin, \{M. N.\} and Sellers, \{I. R.\} and J. Cahill and Andreev, \{A. D.\} and Whittaker, \{D. M.\} and Wells, \{J. P.R.\} and Fox, \{A. M.\} and Mowbray, \{D. J.\} and Skolnick, \{M. S.\} and Groom, \{K. M.\} and Steer, \{M. J.\} and Liu, \{H. Y.\} and M. Hopkinson",

year = "2004",

month = nov,

doi = "10.1103/PhysRevB.70.193303",

language = "English",

volume = "70",

pages = "1--4",

journal = "Physical Review B-Condensed Matter",

issn = "0163-1829",

publisher = "American Institute of Physics",

number = "19",

}

Tartakovskii, AI, Makhonin, MN, Sellers, IR, Cahill, J, Andreev, AD, Whittaker, DM, Wells, JPR, Fox, AM, Mowbray, DJ, Skolnick, MS, Groom, KM, Steer, MJ, Liu, HY & Hopkinson, M 2004, 'Effect of thermal annealing and strain engineering on the fine structure of quantum dot excitons', Physical Review B-Condensed Matter, vol. 70, no. 19, 193303, pp. 1-4. https://doi.org/10.1103/PhysRevB.70.193303

TY - JOUR

T1 - Effect of thermal annealing and strain engineering on the fine structure of quantum dot excitons

AU - Tartakovskii, A. I.

AU - Makhonin, M. N.

AU - Sellers, I. R.

AU - Cahill, J.

AU - Andreev, A. D.

AU - Whittaker, D. M.

AU - Wells, J. P.R.

AU - Fox, A. M.

AU - Mowbray, D. J.

AU - Skolnick, M. S.

AU - Groom, K. M.

AU - Steer, M. J.

AU - Liu, H. Y.

AU - Hopkinson, M.

PY - 2004/11

Y1 - 2004/11

N2 - The fine structure splitting of bright exciton states is measured for a range of thermally annealed InGaAs quantum dot (QD) samples with differing degrees of In/Ga intermixing and also for a dot-in-a-well (DWELL) structure. Magnitudes of the fine structure splitting are determined in polarization-resolved differential transmission experiments from measurements of the period of quantum beats observed in QD exciton dynamics. The splitting is found to decrease in structures with weaker strain: both for In/Ga intermixed QD's and also in dots surrounded by strain-reducing layers (DWELL's). Our findings pave the way to the achievement of entangled two photon sources based on emission from individual QD's, currently prevented since the fine structure splitting is larger than the radiative linewidth.

AB - The fine structure splitting of bright exciton states is measured for a range of thermally annealed InGaAs quantum dot (QD) samples with differing degrees of In/Ga intermixing and also for a dot-in-a-well (DWELL) structure. Magnitudes of the fine structure splitting are determined in polarization-resolved differential transmission experiments from measurements of the period of quantum beats observed in QD exciton dynamics. The splitting is found to decrease in structures with weaker strain: both for In/Ga intermixed QD's and also in dots surrounded by strain-reducing layers (DWELL's). Our findings pave the way to the achievement of entangled two photon sources based on emission from individual QD's, currently prevented since the fine structure splitting is larger than the radiative linewidth.

UR - https://www.scopus.com/pages/publications/19944433765

U2 - 10.1103/PhysRevB.70.193303

DO - 10.1103/PhysRevB.70.193303

M3 - Article

AN - SCOPUS:19944433765

SN - 0163-1829

VL - 70

SP - 1

EP - 4

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

IS - 19

M1 - 193303

ER -

Effect of thermal annealing and strain engineering on the fine structure of quantum dot excitons

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