Surface plasmon excitation of Au and Ag in scanning probe energy loss spectroscopy
Surface plasmon excitation of Au and Ag in scanning probe energy loss spectroscopy
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DOI：
10.1063/1.3006435
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发表时间：
2008-11
影响因子：
4
通讯作者：
Adriano Pulisciano;S. J. Park;R. Palmer
中科院分区：
文献类型：
--
作者：
Adriano Pulisciano;S. J. Park;R. Palmer
我们探讨了Au和Ag薄膜的扫描探针能量损失谱（SPELS）和高分辨电子能量损失谱的电子激发谱的入射能量依赖性。我们表明，在SPELS中获得的光谱强烈依赖于入射电子束能量。在Au的情况下，带间跃迁掩蔽表面等离子体激元，除非场发射电压降低到100 V，而Ag在300 V以上有一个清晰的表面等离子体激元峰。
We explore the incident energy dependence of the electronic excitation spectra of Au and Ag films in scanning probe energy loss spectroscopy (SPELS) and also high resolution electron energy loss spectroscopy. We show that the spectra obtained in SPELS depend strongly on the incident electron beam energy. In the case of Au, interband transitions mask the surface plasmon unless the field emission voltage is reduced to ∼100 V, whereas there is a clear surface plasmon peak above 300 V for Ag.