Modulation of local plasmon mediated emission through molecular manipulation
Modulation of local plasmon mediated emission through molecular manipulation
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通过分子操纵调节局部等离子体介导的发射
DOI：
10.1103/physrevb.79.075406
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发表时间：
2009-02
影响因子：
3.7
通讯作者：
Hou, J. G.
中科院分区：
文献类型：
--
作者：
Zhang, Y.;Dong, Z. C.;Okamoto, T.;Gao, H. Y.;Tao, X.;Hou, J. G.
我们利用单分子操纵研究了吸附分子对Au表面局域等离子体介导发射（LPME）的调制效应。隧道电子激发的发光光谱表明，当一个完整的或切除的CoOEP分子插入到结的LPME的整体抑制。然而，被切除的分子的LPME被发现是强于完整的分子，有点出乎意料的一个稍微大的分子-底物分离。我们将这种增强归因于吸附分子在LPME中可以发挥的三种不同作用的竞争结果：几何介电间隔物，能量耗散器和动态偶极振荡器。
We use single molecular manipulation to investigate the modulation effect of adsorbed molecules on local plasmon mediated emission (LPME) from the Au surface. Tunneling electron excited luminescence spectra indicate an overall suppression of LPME when an intact or excised CoOEP molecule is inserted into the junction. However, the LPME for the excised molecule is found to be stronger than that of the intact molecule, somewhat unexpected for a slightly larger molecule-substrate separation. We attribute such enhancement to a competing result of three different kinds of roles an adsorbed molecule can play in LPME: a geometric dielectric spacer, an energy dissipater, and a dynamic dipole oscillator.