Long nuclear spin polarization decay times controlled by optical pumping in individual quantum dots

M. N. Makhonin; A. I. Tartakovskii; A. B. Van'kov; I. Drouzas; T. Wright; J. Skiba-Szymanska; A. Russell; V. I. Fal'ko; M. S. Skolnick; H. Y. Liu; M. Hopkinson

doi:10.1103/PhysRevB.77.125307

Long nuclear spin polarization decay times controlled by optical pumping in individual quantum dots

M. N. Makhonin, A. I. Tartakovskii, A. B. Van'kov, I. Drouzas, T. Wright, J. Skiba-Szymanska, A. Russell, V. I. Fal'ko, M. S. Skolnick, H. Y. Liu, M. Hopkinson

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Abstract

Nuclear polarization dynamics are measured in the nuclear spin bistability regime in a single optically pumped InGaAs/GaAs quantum dot. The controlling role of nuclear spin diffusion from the dot into the surrounding material is revealed in pump-probe measurements of the nonlinear nuclear spin dynamics. We measure nuclear spin polarization decay times in the range of 0.2-5 s, strongly dependent on the optical pumping time. The long nuclear spin decay arises from polarization of the material surrounding the dot by spin diffusion for long (>5 s) pumping times. The time-resolved methods allow the detection of the unstable nuclear polarization state in the bistability regime otherwise undetectable in cw experiments.

Original language	English
Article number	125307
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	77
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevB.77.125307
Publication status	Published - 6 Mar 2008

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National Graphene Institute

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10.1103/PhysRevB.77.125307

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Makhonin, M. N., Tartakovskii, A. I., Van'kov, A. B., Drouzas, I., Wright, T., Skiba-Szymanska, J., Russell, A., Fal'ko, V. I., Skolnick, M. S., Liu, H. Y., & Hopkinson, M. (2008). Long nuclear spin polarization decay times controlled by optical pumping in individual quantum dots. Physical Review B - Condensed Matter and Materials Physics, 77(12), Article 125307. https://doi.org/10.1103/PhysRevB.77.125307

@article{969df49e414843ab86c658b9e5327db1,

title = "Long nuclear spin polarization decay times controlled by optical pumping in individual quantum dots",

abstract = "Nuclear polarization dynamics are measured in the nuclear spin bistability regime in a single optically pumped InGaAs/GaAs quantum dot. The controlling role of nuclear spin diffusion from the dot into the surrounding material is revealed in pump-probe measurements of the nonlinear nuclear spin dynamics. We measure nuclear spin polarization decay times in the range of 0.2-5 s, strongly dependent on the optical pumping time. The long nuclear spin decay arises from polarization of the material surrounding the dot by spin diffusion for long (>5 s) pumping times. The time-resolved methods allow the detection of the unstable nuclear polarization state in the bistability regime otherwise undetectable in cw experiments.",

author = "Makhonin, {M. N.} and Tartakovskii, {A. I.} and Van'kov, {A. B.} and I. Drouzas and T. Wright and J. Skiba-Szymanska and A. Russell and Fal'ko, {V. I.} and Skolnick, {M. S.} and Liu, {H. Y.} and M. Hopkinson",

year = "2008",

month = mar,

day = "6",

doi = "10.1103/PhysRevB.77.125307",

language = "English",

volume = "77",

journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "1098-0121",

publisher = "American Physical Society",

number = "12",

}

Makhonin, MN, Tartakovskii, AI, Van'kov, AB, Drouzas, I, Wright, T, Skiba-Szymanska, J, Russell, A, Fal'ko, VI, Skolnick, MS, Liu, HY & Hopkinson, M 2008, 'Long nuclear spin polarization decay times controlled by optical pumping in individual quantum dots', Physical Review B - Condensed Matter and Materials Physics, vol. 77, no. 12, 125307. https://doi.org/10.1103/PhysRevB.77.125307

TY - JOUR

T1 - Long nuclear spin polarization decay times controlled by optical pumping in individual quantum dots

AU - Makhonin, M. N.

AU - Tartakovskii, A. I.

AU - Van'kov, A. B.

AU - Drouzas, I.

AU - Wright, T.

AU - Skiba-Szymanska, J.

AU - Russell, A.

AU - Fal'ko, V. I.

AU - Skolnick, M. S.

AU - Liu, H. Y.

AU - Hopkinson, M.

PY - 2008/3/6

Y1 - 2008/3/6

N2 - Nuclear polarization dynamics are measured in the nuclear spin bistability regime in a single optically pumped InGaAs/GaAs quantum dot. The controlling role of nuclear spin diffusion from the dot into the surrounding material is revealed in pump-probe measurements of the nonlinear nuclear spin dynamics. We measure nuclear spin polarization decay times in the range of 0.2-5 s, strongly dependent on the optical pumping time. The long nuclear spin decay arises from polarization of the material surrounding the dot by spin diffusion for long (>5 s) pumping times. The time-resolved methods allow the detection of the unstable nuclear polarization state in the bistability regime otherwise undetectable in cw experiments.

AB - Nuclear polarization dynamics are measured in the nuclear spin bistability regime in a single optically pumped InGaAs/GaAs quantum dot. The controlling role of nuclear spin diffusion from the dot into the surrounding material is revealed in pump-probe measurements of the nonlinear nuclear spin dynamics. We measure nuclear spin polarization decay times in the range of 0.2-5 s, strongly dependent on the optical pumping time. The long nuclear spin decay arises from polarization of the material surrounding the dot by spin diffusion for long (>5 s) pumping times. The time-resolved methods allow the detection of the unstable nuclear polarization state in the bistability regime otherwise undetectable in cw experiments.

UR - http://www.scopus.com/inward/record.url?scp=41449090408&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.77.125307

DO - 10.1103/PhysRevB.77.125307

M3 - Article

AN - SCOPUS:41449090408

SN - 1098-0121

VL - 77

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 12

M1 - 125307

ER -

Long nuclear spin polarization decay times controlled by optical pumping in individual quantum dots

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