Ultrasensitive Size-Selection of Plasmonic Nanoparticles by Fano Interference Optical Force

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	Ultrasensitive Size-Selection of Plasmonic Nanoparticles by Fano Interference Optical Force
	Li, ZP ; Zhang, SP ; Tong, LM ; Wang, PJ ; Dong, B ; Xu, HX
刊名	ACS NANO
	2014
卷号	8 期号:1 页码:701
关键词	size-selective optical sorting surface plasmons Fano resonance scattering forces
ISSN号	1936-0851
通讯作者	Li, ZP (reprint author), Capital Normal Univ, Dept Phys, Beijing Key Lab NanoPhoton & NanoStruct NPNS, Beijing 100048, Peoples R China.
中文摘要	In this paper, we propose a solution for the ultrasensitive optical selection of plasmonic nanoparticles using Fano interference-induced scattering forces. Under a Gaussian beam excitation, the scattering of a plasmonic nanoparticle at its Fano resonance becomes strongly asymmetric in the lateral direction and consequently results in a net transverse scattering force, that is, Fano interference-induced force. The magnitude of this transverse scattering force is comparable with the gradient force in conventional optical manipulation experiments. More interestingly, the Fano scattering force is ultrasensitive to the particle size and excitation frequency due to the phase sensitivity of the interference between adjacent plasmon modes in the particle. Utilizing this distinct feature, we show the possibility of size-selective sorting of silver and gold nanoparticles with an accuracy of about +/- 10 nm and silica-gold core-shell nanoparticles with shell thickness down to several nanometers. These results would add to the toolbox of optical manipulation and fabrication.
资助信息	National Natural Science Foundation of China [11274004, 11374355, 11227407]; NCET [NCET-13-0915]; Beijing Nova Program [2011079]; Beijing Natural Science Foundation [1122012]; MOST [2012YQ12006005]
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/58796]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Li, ZP,Zhang, SP,Tong, LM,et al. Ultrasensitive Size-Selection of Plasmonic Nanoparticles by Fano Interference Optical Force[J]. ACS NANO,2014,8(1):701.
APA	Li, ZP,Zhang, SP,Tong, LM,Wang, PJ,Dong, B,&Xu, HX.(2014).Ultrasensitive Size-Selection of Plasmonic Nanoparticles by Fano Interference Optical Force.ACS NANO,8(1),701.
MLA	Li, ZP,et al."Ultrasensitive Size-Selection of Plasmonic Nanoparticles by Fano Interference Optical Force".ACS NANO 8.1(2014):701.