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

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 03期

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

页数：4

共 38 条

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[23] Exciton dynamics and logic operations in a near-field optically coupled quantum-dot system (vol 112, pg 117, 2005)
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[25] Observation of size-dependent resonance of near-field coupling between a deposited Zn dot and the probe apex during near-field, optical chemical vapor deposition
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[26] Charge carrier dynamics in PbSe quantum-dot films studied by femtosecond pump-probe scattering scanning near-field optical microscopy
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[27] Emission from a dipole-forbidden energy state in a ZnO quantum dot induced by a near-field interaction with a fiber probe
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[29] Enhancement of Molecular Fluorescence in the UV Spectral Range Using Aluminum NanoantennasOn the Role of Nanoparticle Shape and Near-Field Coupling
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[30] Enhanced Emission from Single Isolated Gold Quantum Dots Investigated Using Two-Photon-Excited Fluorescence Near-Field Scanning Optical Microscopy
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