Coulomb effect inhibiting spontaneous emission in charged quantum dot

Kamil Gradkowski; Tomasz J. Ochalski; Nicola Pavarelli; David P. Williams; Guillaume Huyet; Baolai Liang; Diana L. Huffaker

doi:10.1063/1.3484143

Coulomb effect inhibiting spontaneous emission in charged quantum dot

Kamil Gradkowski
, Tomasz J. Ochalski
, Nicola Pavarelli
, David P. Williams
, Guillaume Huyet
, Baolai Liang
, Diana L. Huffaker

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

Abstract

We investigate the emission dynamics of InAs/GaAs quantum dots (QDs) coupled to an InGaAs quantum well in a tunnel injection scheme by means of time-resolved photoluminescence. Under high-power excitation we observe a redshift in the QD emission of the order of 20 meV. The optical transition intensity shows a complex evolution, where an initial plateau phase is followed by an increase in intensity before a single-exponential decay. We attribute this behavior to the Coulomb interactions between the carriers in a charged QD and corroborate the experimental results with both a rate equation model and self-consistent eight-band kp calculations.

Original language	English
Article number	091105
Journal	Applied Physics Letters
Volume	97
Issue number	9
DOIs	https://doi.org/10.1063/1.3484143
Publication status	Published - 30 Aug 2010

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title = "Coulomb effect inhibiting spontaneous emission in charged quantum dot",

abstract = "We investigate the emission dynamics of InAs/GaAs quantum dots (QDs) coupled to an InGaAs quantum well in a tunnel injection scheme by means of time-resolved photoluminescence. Under high-power excitation we observe a redshift in the QD emission of the order of 20 meV. The optical transition intensity shows a complex evolution, where an initial plateau phase is followed by an increase in intensity before a single-exponential decay. We attribute this behavior to the Coulomb interactions between the carriers in a charged QD and corroborate the experimental results with both a rate equation model and self-consistent eight-band kp calculations.",

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doi = "10.1063/1.3484143",

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T1 - Coulomb effect inhibiting spontaneous emission in charged quantum dot

AU - Gradkowski, Kamil

AU - Ochalski, Tomasz J.

AU - Pavarelli, Nicola

AU - Williams, David P.

AU - Huyet, Guillaume

AU - Liang, Baolai

AU - Huffaker, Diana L.

PY - 2010/8/30

Y1 - 2010/8/30

N2 - We investigate the emission dynamics of InAs/GaAs quantum dots (QDs) coupled to an InGaAs quantum well in a tunnel injection scheme by means of time-resolved photoluminescence. Under high-power excitation we observe a redshift in the QD emission of the order of 20 meV. The optical transition intensity shows a complex evolution, where an initial plateau phase is followed by an increase in intensity before a single-exponential decay. We attribute this behavior to the Coulomb interactions between the carriers in a charged QD and corroborate the experimental results with both a rate equation model and self-consistent eight-band kp calculations.

AB - We investigate the emission dynamics of InAs/GaAs quantum dots (QDs) coupled to an InGaAs quantum well in a tunnel injection scheme by means of time-resolved photoluminescence. Under high-power excitation we observe a redshift in the QD emission of the order of 20 meV. The optical transition intensity shows a complex evolution, where an initial plateau phase is followed by an increase in intensity before a single-exponential decay. We attribute this behavior to the Coulomb interactions between the carriers in a charged QD and corroborate the experimental results with both a rate equation model and self-consistent eight-band kp calculations.

UR - https://www.scopus.com/pages/publications/77956378122

U2 - 10.1063/1.3484143

DO - 10.1063/1.3484143

M3 - Article

AN - SCOPUS:77956378122

SN - 0003-6951

VL - 97

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 9

M1 - 091105

ER -

Coulomb effect inhibiting spontaneous emission in charged quantum dot

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