Using the Near-Field Coupling of a Sharp Tip to Tune Fluorescence-Emission Fluctuations during Quantum-Dot Blinking

被引:21
|
作者
Shafran, Eyal [1 ]
Mangum, Benjamin D. [1 ]
Gerton, Jordan M. [1 ]
机构
[1] Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA
基金
美国国家科学基金会;
关键词
SCANNING OPTICAL MICROSCOPY; SINGLE-MOLECULE; SEMICONDUCTOR NANOCRYSTALS; CARBON NANOTUBE; ENERGY-TRANSFER; INTENSITY; ANTENNAS; STATES;
D O I
10.1103/PhysRevLett.107.037403
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We demonstrate that the cycling between internal states of quantum dots during fluorescence blinking can be used to tune the near-field coupling with a sharp tip. In particular, the fluorescence emission from states with high quantum yield is quenched due to energy transfer, while that from low-yield states is elevated due to field enhancement. Thus, as a quantum dot blinks, its emission fluctuations are progressively suppressed upon approach of a tip.
引用
收藏
页数:4
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