Exciton-phonon coupling channels in a 'strain-free’ GaAs droplet epitaxy single quantum dot

Song ee Lee; Inah Yeo; Min Kyung Jo; Young Woo Jeong; Tae Geun Kim; Jong Su Kim; Kyung Soo Yi; Il Ki Han; Jin Dong Song

doi:10.1016/j.cap.2018.04.003

Exciton-phonon coupling channels in a 'strain-free’ GaAs droplet epitaxy single quantum dot

Song ee Lee, Inah Yeo, Min Kyung Jo, Young Woo Jeong, Tae Geun Kim, Jong Su Kim, Kyung Soo Yi, Il Ki Han, Jin Dong Song

School of Electrical Engineering

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

5 Citations (Scopus)

Abstract

We examine the temperature-dependent excitonic transition energy shift of strain-free GaAs droplet epitaxy (DE) quantum dots (QDs). Interestingly the statistical investigation of QD optical properties enables us to observe three distinct temperature dispersions for four series of DE QDs. We present comparative analyses of the exciton-phonon coupling mechanisms employing various empirical to multi-oscillator models associated with each QD-specific phonon dispersion spectrum. The systematic investigation of such QD exciton-phonon coupling is crucial for fine control of local defects in engineered quantum dot single-photon sources.

Original language	English
Pages (from-to)	829-833
Number of pages	5
Journal	Current Applied Physics
Volume	18
Issue number	7
DOIs	https://doi.org/10.1016/j.cap.2018.04.003
Publication status	Published - 2018 Jul

Bibliographical note

Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (No. 2017R1A6A3A04001981 and No. 2013R1A1A4A01004433) and by the Pioneer Research Center Program through the NRF funded by the Ministry of Science, ICT & Future Plan-ning (NRF-2013M3C1A3065033). The authors at KIST also acknowledge financial supports from the KIST Internal Program of flag-ship (2E26420).

Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (No. 2017R1A6A3A04001981 and No. 2013R1A1A4A01004433 ) and by the Pioneer Research Center Program through the NRF funded by the Ministry of Science, ICT & Future Plan-ning ( NRF-2013M3C1A3065033 ). The authors at KIST also acknowledge financial supports from the KIST Internal Program of flag-ship ( 2E26420 ).

Publisher Copyright:
© 2018

Keywords

Droplet epitaxy
Engineered quantum dot single-photon source
Exciton-phonon coupling
Strain-free quantum dot

ASJC Scopus subject areas

Materials Science(all)
Physics and Astronomy(all)

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10.1016/j.cap.2018.04.003

Cite this

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title = "Exciton-phonon coupling channels in a 'strain-free{\textquoteright} GaAs droplet epitaxy single quantum dot",

abstract = "We examine the temperature-dependent excitonic transition energy shift of strain-free GaAs droplet epitaxy (DE) quantum dots (QDs). Interestingly the statistical investigation of QD optical properties enables us to observe three distinct temperature dispersions for four series of DE QDs. We present comparative analyses of the exciton-phonon coupling mechanisms employing various empirical to multi-oscillator models associated with each QD-specific phonon dispersion spectrum. The systematic investigation of such QD exciton-phonon coupling is crucial for fine control of local defects in engineered quantum dot single-photon sources.",

keywords = "Droplet epitaxy, Engineered quantum dot single-photon source, Exciton-phonon coupling, Strain-free quantum dot",

author = "Lee, {Song ee} and Inah Yeo and Jo, {Min Kyung} and Jeong, {Young Woo} and Kim, {Tae Geun} and Kim, {Jong Su} and Yi, {Kyung Soo} and Han, {Il Ki} and Song, {Jin Dong}",

note = "Funding Information: This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (No. 2017R1A6A3A04001981 and No. 2013R1A1A4A01004433) and by the Pioneer Research Center Program through the NRF funded by the Ministry of Science, ICT & Future Plan-ning (NRF-2013M3C1A3065033). The authors at KIST also acknowledge financial supports from the KIST Internal Program of flag-ship (2E26420). Funding Information: This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (No. 2017R1A6A3A04001981 and No. 2013R1A1A4A01004433 ) and by the Pioneer Research Center Program through the NRF funded by the Ministry of Science, ICT & Future Plan-ning ( NRF-2013M3C1A3065033 ). The authors at KIST also acknowledge financial supports from the KIST Internal Program of flag-ship ( 2E26420 ). Publisher Copyright: {\textcopyright} 2018",

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language = "English",

volume = "18",

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AU - Yeo, Inah

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AU - Jeong, Young Woo

AU - Kim, Tae Geun

AU - Kim, Jong Su

AU - Yi, Kyung Soo

AU - Han, Il Ki

AU - Song, Jin Dong

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PY - 2018/7

Y1 - 2018/7

N2 - We examine the temperature-dependent excitonic transition energy shift of strain-free GaAs droplet epitaxy (DE) quantum dots (QDs). Interestingly the statistical investigation of QD optical properties enables us to observe three distinct temperature dispersions for four series of DE QDs. We present comparative analyses of the exciton-phonon coupling mechanisms employing various empirical to multi-oscillator models associated with each QD-specific phonon dispersion spectrum. The systematic investigation of such QD exciton-phonon coupling is crucial for fine control of local defects in engineered quantum dot single-photon sources.

AB - We examine the temperature-dependent excitonic transition energy shift of strain-free GaAs droplet epitaxy (DE) quantum dots (QDs). Interestingly the statistical investigation of QD optical properties enables us to observe three distinct temperature dispersions for four series of DE QDs. We present comparative analyses of the exciton-phonon coupling mechanisms employing various empirical to multi-oscillator models associated with each QD-specific phonon dispersion spectrum. The systematic investigation of such QD exciton-phonon coupling is crucial for fine control of local defects in engineered quantum dot single-photon sources.

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Exciton-phonon coupling channels in a 'strain-free’ GaAs droplet epitaxy single quantum dot

Abstract

Bibliographical note

Keywords

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