Laser & Optoelectronics Progress, Volume. 55, Issue 7, 71601(2018)
Effect of Gold Nanoparticles on Fluorescence Spontaneous Emission of Quantum Dots
The effect of gold nanoparticles on the fluorescence spontaneous emission of CdSe/ZnS quantum dots (QDs) is investigated based on the time-correlated single photon counting technique. The quantum dot samples coupled with gold nanoparticles effectively are prepared. The fluorescence lifetime of QDs with a high concentration is measured, and it is found that the fluorescence lifetime of QDs can be significantly reduced by the gold nanoparticles. The fluorescence properties of a single QD are also studied and it is found that the fluorescence lifetime of the quantum dot coupled with gold nanoparticles is reduced to about one percent of that without gold nanoparticles. The effects of the polarization direction of QDs, the distance between the QDs and the gold nanoparticles, the diameters of gold nanoparticles and other parameters on the fluorescence spontaneous emission rate of QDs are investigated by the numerical calculation.
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Wan Jianing, Lin Yu, Zhong Ying, Liu Haitao. Effect of Gold Nanoparticles on Fluorescence Spontaneous Emission of Quantum Dots[J]. Laser & Optoelectronics Progress, 2018, 55(7): 71601
Category: Materials
Received: Jan. 5, 2018
Accepted: --
Published Online: Jul. 20, 2018
The Author Email: Haitao Liu (liuht@nankai.edu.cn)