e-Journal of Surface Science and Nanotechnology
Online ISSN : 1348-0391
ISSN-L : 1348-0391
Conference -Nano-org. & Func.-
Anti-parallel coupling of Quantum Dots with an Optical Near-Field Interaction
Tadashi KawazoeKiyoshi KobayashiMotoichi Ohtsu
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2005 Volume 3 Pages 74-78

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Abstract

We report the direct observation of optically forbidden energy transfer between cubic CuCl quantum dots via an optical near-field interaction using time-resolved near-field photoluminescence (PL) spectroscopy. The energy transfer time and exciton lifetime were estimated from the rise and decay times of the PL pump-probe signal, respectively. We found that the exciton lifetime increased as the energy transfer time fell, which strongly supports the notion that near-field interaction between QD makes the anti-parallel dipole coupling. Namely, a quantum-dots pair coupled by an optical near field has a long exciton lifetime and optically forbidden features due to its anti-parallel electric dipole pair. [DOI: 10.1380/ejssnt.2005.74]

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この記事はクリエイティブ・コモンズ [表示 4.0 国際]ライセンスの下に提供されています。
https://creativecommons.org/licenses/by/4.0/deed.ja
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