Nonlinear inelastic electron scattering from Au nanostructures induced by localized surface plasmon resonance
Nonlinear inelastic electron scattering from Au nanostructures induced by localized surface plasmon resonance
复制标题
局域表面等离子体共振引起的金纳米结构的非线性非弹性电子散射
DOI:
10.1038/s41598-018-24065-z
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发表时间:
2018-04
影响因子:
4.6
通讯作者:
Chen XiangJun
中科院分区:
文献类型:
--
作者:
Li Zhean;Xu ChunKai;Liu WenJie;Li Meng;Chen XiangJun
Nonlinear electron scattering is a recently-discovered physical process observed during the localized plasmonic excitation of Ag nanostructures on graphite surface. In the present work, nonlinear electron scattering phenomena is experimentally verified on Au nanostructures by measuring inelastic scattering of electrons field-emitted from tungsten tip. The relative intensity of the electron-energy-loss peak associated with the plasmonic excitation of Au shows again to increase nonlinearly with the electric field generated by the tip-sample bias, demonstrating the generality of nonlinear electron scattering process in plasmonic system. Compared to the nonlinear electron scattering phenomena observed on Ag nanostructures, the nonlinear term for Au nanostructures is about 1 to 2 orders of magnitude smaller, which is in consistent with the field enhancement factor of Au and Ag nanostructures from both the surface-enhanced Raman spectroscopy experiments and the theoretical calculations.
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