Optical trapping of single nano-size particles using a plasmonic nanocavity
文献类型:期刊论文
作者 | Zhang, Jiachen4,5; Lu, Fanfan4,5; Zhang, Wending4,5; Yu, Weixing3; Zhu, Weiren2; Premaratne, Malin1; Mei, Ting4,5; Xiao, Fajun3,4,5; Zhao, Jianlin4,5 |
刊名 | JOURNAL OF PHYSICS-CONDENSED MATTER |
出版日期 | 2020-11-11 |
卷号 | 32期号:47 |
ISSN号 | 0953-8984;1361-648X |
关键词 | optical tweezer optical trapping plasmonic nanofocusing radial vector mode |
DOI | 10.1088/1361-648X/abaead |
产权排序 | 3 |
英文摘要 | Trapping and manipulating micro-size particles using optical tweezers has contributed to many breakthroughs in biology, materials science, and colloidal physics. However, it remains challenging to extend this technique to a few nanometers particles owing to the diffraction limit and the considerable Brownian motion of trapped nanoparticles. In this work, a nanometric optical tweezer is proposed by using a plasmonic nanocavity composed of the closely spaced silver coated fiber tip and gold film. It is found that the radial vector mode can produce a nano-sized near field with the electric-field intensity enhancement factor over 10(3)through exciting the plasmon gap mode in the nanocavity. By employing the Maxwell stress tensor formalism, we theoretically demonstrate that this nano-sized near field results in a sharp quasi-harmonic potential well, capable of stably trapping 2 nm quantum dots beneath the tip apex with the laser power as low as 3.7 mW. Further analysis reveals that our nanotweezers can stably work in a wide range of particle-to-tip distances, gap sizes, and operation wavelengths. We envision that our proposed nanometric optical tweezers could be compatible with the tip-enhanced Raman spectroscopy to allow simultaneously manipulating and characterizing single nanoparticles as well as nanoparticle interactions with high sensitivity. |
语种 | 英语 |
出版者 | IOP PUBLISHING LTD, TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
WOS记录号 | WOS:000566139500001 |
源URL | [http://ir.opt.ac.cn/handle/181661/93695] |
专题 | 西安光学精密机械研究所_光学影像学习与分析中心 |
通讯作者 | Zhang, Wending; Zhu, Weiren; Xiao, Fajun |
作者单位 | 1.Monash Univ, Dept Elect & Comp Syst Engn, Adv Comp & Simulat Lab AXL, Clayton, Vic 3800, Australia 2.Shanghai Jiao Tong Univ, Dept Elect Engn, Shanghai 200240, Peoples R China 3.Xian Inst Opt & Precis Mech CAS, CAS Key Lab Spectral Imaging Technol, Xian 710119, Peoples R China 4.Northwestern Polytech Univ, Sch Phys Sci & Technol, Shaanxi Key Lab Opt Informat Technol, Xian 710129, Peoples R China 5.Northwestern Polytech Univ, Sch Phys Sci & Technol, MOE Key Lab Mat Phys & Chem Extraordinary Condit, Xian 710129, Peoples R China |
推荐引用方式 GB/T 7714 | Zhang, Jiachen,Lu, Fanfan,Zhang, Wending,et al. Optical trapping of single nano-size particles using a plasmonic nanocavity[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2020,32(47). |
APA | Zhang, Jiachen.,Lu, Fanfan.,Zhang, Wending.,Yu, Weixing.,Zhu, Weiren.,...&Zhao, Jianlin.(2020).Optical trapping of single nano-size particles using a plasmonic nanocavity.JOURNAL OF PHYSICS-CONDENSED MATTER,32(47). |
MLA | Zhang, Jiachen,et al."Optical trapping of single nano-size particles using a plasmonic nanocavity".JOURNAL OF PHYSICS-CONDENSED MATTER 32.47(2020). |
入库方式: OAI收割
来源:西安光学精密机械研究所
其他版本
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。