Nonresonant carrier transfer in single InGaAs/GaAs quantum dot molecules

Wen Hao Chang; Hsuan Lin; Sheng Yun Wang; Chia Hsien Lin; Shun Jen Cheng; Ming Chih Lee; Wen Yen Chen; Tzu Min Hsu; Tung Po Hsieh; Jen Inn Chyi

doi:10.1103/PhysRevB.77.245314

Nonresonant carrier transfer in single InGaAs/GaAs quantum dot molecules

Wen Hao Chang, Hsuan Lin, Sheng Yun Wang, Chia Hsien Lin, Shun Jen Cheng, Ming Chih Lee, Wen Yen Chen, Tzu Min Hsu, Tung Po Hsieh, Jen Inn Chyi

研究成果: 雜誌貢獻 › 期刊論文 › 同行評審

14 引文斯高帕斯（Scopus）

摘要

We present a spectroscopic study of single quantum dot molecules (QDMs) formed by two closely stacked In0.5 Ga0.5 As layers. The exciton fine structures as well as direct and indirect excitonic species associated with QDMs were identified by power dependent and polarization resolved microphotoluminescence measurements. As the temperature was increased, a directional energy transfer between the direct and indirect excitons in single QDMs was observed. A rate-equation model was developed to explain our data. We show that a phonon-assisted nonresonant tunneling of the hole between the two adjacent dots is responsible for such directional energy transfers in QDMs.

原文	???core.languages.en_GB???
文章編號	245314
期刊	Physical Review B - Condensed Matter and Materials Physics
卷	77
發行號	24
DOIs	https://doi.org/10.1103/PhysRevB.77.245314
出版狀態	已出版 - 13 6月 2008

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10.1103/PhysRevB.77.245314

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abstract = "We present a spectroscopic study of single quantum dot molecules (QDMs) formed by two closely stacked In0.5 Ga0.5 As layers. The exciton fine structures as well as direct and indirect excitonic species associated with QDMs were identified by power dependent and polarization resolved microphotoluminescence measurements. As the temperature was increased, a directional energy transfer between the direct and indirect excitons in single QDMs was observed. A rate-equation model was developed to explain our data. We show that a phonon-assisted nonresonant tunneling of the hole between the two adjacent dots is responsible for such directional energy transfers in QDMs.",

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T1 - Nonresonant carrier transfer in single InGaAs/GaAs quantum dot molecules

AU - Chang, Wen Hao

AU - Lin, Hsuan

AU - Wang, Sheng Yun

AU - Lin, Chia Hsien

AU - Cheng, Shun Jen

AU - Lee, Ming Chih

AU - Chen, Wen Yen

AU - Hsu, Tzu Min

AU - Hsieh, Tung Po

AU - Chyi, Jen Inn

PY - 2008/6/13

Y1 - 2008/6/13

N2 - We present a spectroscopic study of single quantum dot molecules (QDMs) formed by two closely stacked In0.5 Ga0.5 As layers. The exciton fine structures as well as direct and indirect excitonic species associated with QDMs were identified by power dependent and polarization resolved microphotoluminescence measurements. As the temperature was increased, a directional energy transfer between the direct and indirect excitons in single QDMs was observed. A rate-equation model was developed to explain our data. We show that a phonon-assisted nonresonant tunneling of the hole between the two adjacent dots is responsible for such directional energy transfers in QDMs.

AB - We present a spectroscopic study of single quantum dot molecules (QDMs) formed by two closely stacked In0.5 Ga0.5 As layers. The exciton fine structures as well as direct and indirect excitonic species associated with QDMs were identified by power dependent and polarization resolved microphotoluminescence measurements. As the temperature was increased, a directional energy transfer between the direct and indirect excitons in single QDMs was observed. A rate-equation model was developed to explain our data. We show that a phonon-assisted nonresonant tunneling of the hole between the two adjacent dots is responsible for such directional energy transfers in QDMs.

UR - http://www.scopus.com/inward/record.url?scp=45349102115&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.77.245314

DO - 10.1103/PhysRevB.77.245314

M3 - 期刊論文

AN - SCOPUS:45349102115

SN - 1098-0121

VL - 77

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 24

M1 - 245314

ER -

Nonresonant carrier transfer in single InGaAs/GaAs quantum dot molecules

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