Förster Energy Transfer in Arrays of Epitaxial CdSe/ZnSe Quantum Dots Involving Bright and Dark Excitons

Journal Article · Wed Aug 15 04:00:00 EDT 2018 · Physics of the Solid State

DOI:https://doi.org/10.1134/S1063783418080176· OSTI ID:22771053

Evropeitsev, E. A.; Belyaev, K. G.; Toropov, A. A.; Rodina, A. V.; Golovatenko, A. A.; Ivanov, S. V. ^[1]; Pozina, G. ^[2]; Shubina, T. V. ^[1]

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1. Ioffe Institute (Russian Federation)
2. Linköping University (Sweden)

Using time-resolved photoluminescence (PL) spectroscopy, we establish the presence of the Förster energy transfer mechanism between two arrays of epitaxial CdSe/ZnSe quantum dots (QDs) of different sizes. The mechanism operates through dipole–dipole interaction between ground excitonic states of the smaller QDs and excited states of the larger QDs. The dependence of energy transfer efficiency on the width of barrier separating the QD insets is shown to be in line with the Förster mechanism. The temperature dependence of the PL decay times and PL intensity suggests the involvement of dark excitons in the energy transfer process.

• OSTI ID: 22771053
• Journal Information: Physics of the Solid State, Journal Name: Physics of the Solid State Journal Issue: 8 Vol. 60; ISSN 1063-7834
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CADMIUM SELENIDES
DIFFUSION BARRIERS
DIPOLES
EFFICIENCY
ENERGY TRANSFER
EPITAXY
EXCITED STATES
EXCITONS
INTERACTIONS
PHOTOLUMINESCENCE
QUANTUM DOTS
SPECTROSCOPY
TEMPERATURE DEPENDENCE
TIME RESOLUTION
ZINC SELENIDES