Self-aligned placement and detection of quantum dots on the tips of individual conical plasmonic nanostructures.

Self-aligned placement and detection of quantum dots on the tips of individual conical plasmonic nanostructures.
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单个圆锥形等离子体纳米结构尖端上量子点的自对准放置和检测

DOI:
10.1039/c5nr03546e
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发表时间:
2015
期刊:
影响因子:
6.7
通讯作者:
M. Fleischer
M. Fleischer
中科院分区:
材料科学2区
文献类型:
--
作者:
J. Fulmes;R. Jäger;A. Bräuer;C. Schäfer;S. Jäger;D.A. Gollmer;A. Horrer;E. Nadler;T. Chassé;D. Zhang;A.J. Meixner;D.P. Kern;M. Fleischer

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将少量或单个量子点耦合到单个光学天线的混合结构是纳米光学研究的主要兴趣。来自单个纳米发射体(例如QD)的光致发光(PL)信号可以通过将它们耦合到等离子体纳米结构来增强,并且它们的发射特性可以被修改。在这里,一个自对准技术,用于放置纳米级量子点与约10 nm的横向精度和明确定义的分子距离的提示,个别nanocones的报道。这样,QD被精确地定位在可以在锥顶点附近创建的高近场区域中。在径向偏振激光束的焦点处激发锥体,并且光谱检测锥体尖端上的少数或单个QD的PL信号。
Hybrid structures of few or single quantum dots (QDs) coupled to single optical antennas are of prime interest for nano-optical research. The photoluminescence (PL) signal from single nanoemitters, such as QDs, can be enhanced, and their emission characteristics modified, by coupling them to plasmonic nanostructures. Here, a self-aligned technique for placing nanoscale QDs with about 10 nm lateral accuracy and well-defined molecular distances to the tips of individual nanocones is reported. This way the QDs are positioned exactly in the high near-field region that can be created near the cone apex. The cones are excited in the focus of a radially polarized laser beam and the PL signal of few or single QDs on the cone tips is spectrally detected.
DOI: 10.1103/physrevb.75.033309
发表时间: 2007-01-01
期刊: PHYSICAL REVIEW B
影响因子: 3.7
作者:
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