Electromagnetic field enhancement in TERS configurations

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	Electromagnetic field enhancement in TERS configurations
	Yang, Z. L. ; Aizpurua, J. ; Xu, H. X. ; Yang ZL(杨志林)
刊名	http://dx.doi.org/10.1002/jrs.2429
	2009-10
关键词	DIFFERENCE TIME-DOMAIN ELECTRON-ENERGY-LOSS RAMAN-SPECTROSCOPY SINGLE-MOLECULE TRANSITION-METALS SCATTERING SERS NANOPARTICLES SIMULATION DIELECTRICS
英文摘要	NSFC [10625418, 20703032]; MOST [2006DFBO2020, 2007CB936800, 2009CB930703]; CAS; CSIC [2008601039]; MEC [FIS2007-66711-c01-01]; Natural Science Foundation of Fujian Province of China [E0710028]; We use three-dimensional finite-difference time domain (3D-FDTD) simulations to investigate the field enhancement properties of tip-enhanced Raman scattering (TIERS) in order to find optimal geometric parameters of the metal tip and the metal substrate under certain excitation wavelengths with side illumination. The simulation results show that plasmon coupling effects between the metal tip and the metal substrate play the key role in TIERS enhancement, and the enhancement drops dramatically as the distance between the tip and the substrate increases. The spatial resolution of TIERS is mainly dependent on the radius of curvature of the tip end. A sharp tip with a small radius can dramatically increase the spatial resolution of TERS. Increasing the tip-substrate distance or changing the metallic substrate into a dielectric substrate lowers the spatial resolution. The TERS enhancement dependence on the incident angle and polarization, the size of tip, as well as the composition of the substrate is also discussed in detail. Copyright (C) 2009 John Wiley & Sons, Ltd.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/69596]
专题	物理技术－已发表论文
推荐引用方式 GB/T 7714	Yang, Z. L.,Aizpurua, J.,Xu, H. X.,et al. Electromagnetic field enhancement in TERS configurations[J]. http://dx.doi.org/10.1002/jrs.2429,2009.
APA	Yang, Z. L.,Aizpurua, J.,Xu, H. X.,&杨志林.(2009).Electromagnetic field enhancement in TERS configurations.http://dx.doi.org/10.1002/jrs.2429.
MLA	Yang, Z. L.,et al."Electromagnetic field enhancement in TERS configurations".http://dx.doi.org/10.1002/jrs.2429 (2009).