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

Title
Exciton-phonon coupling channels in a ‘strain-free’ GaAs droplet epitaxy single quantum dot
Authors
한일기송진동조민경정영우여인아이송이김태근김종수이경수
Keywords
Engineered quantum dot single-photon source; Strain-free quantum dot; Droplet epitaxy; Exciton-phonon coupling
Issue Date
2018-07
Publisher
Current applied physics
Citation
VOL 18, NO 7-833
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 excitonphonon coupling mechanisms employing various empirical to multi-oscillator models associated with each QDspecific 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.
URI
http://pubs.kist.re.kr/handle/201004/68035
ISSN
1567-1739
Appears in Collections:
KIST Publication > Article
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