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

Research output: Contribution to journalArticlepeer-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 languageEnglish
Pages (from-to)829-833
Number of pages5
JournalCurrent Applied Physics
Volume18
Issue number7
DOIs
Publication statusPublished - 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

  • General Materials Science
  • General Physics and Astronomy

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