Dynamic optical tweezers for metallic particle manipulation via tunable plasmonic fields  

作　　者：YING WANG SHIBIAO WEI ZHENDONG JU CHANGJUN MIN MICHAEL SOMEKH XIAOCONG YUAN 

机构地区：[1]Nanophotonics Research Center,Institute of Microscale Optoelectronics&State Key Laboratory of Radio Frequency Heterogeneous Integration,Shenzhen University,Shenzhen 518060,China [2]Research Center for Humanoid Sensing,Zhejiang Laboratory,Hangzhou 311100,China [3]Faculty of Engineering,University of Nottingham,Nottingham NG72RD,UK

出　　处：《Photonics Research》2024年第9期1840-1845,共6页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(62175162);Scientific Instrument Developing Project of Shenzhen University(2023YQ001);Shenzhen University 2035 Program for Excellent Research(2022C013);Research Team Cultivation Program of Shenzhen University(2023QNT012).

摘　　要：Optical trapping has revolutionized various scientific disciplines with its non-invasive,high-resolution manipulation capabilities.However,conventional optical tweezers face limitations in effectively manipulating metallic particles due to their high reflectivity and associated scattering forces.Plasmonic tweezers,harnessing surface plasmons in metallic nanostructures,offer a promising solution by confining light to deep subwavelength scales and enhancing optical forces.However,dynamically manipulating metallic particles with plasmonic tweezers without mechanical adjustments remains a significant challenge.In this paper,we propose a novel approach utilizing dynamic optical tweezers with tunable plasmonic fields for metallic particle manipulation.By dynamically tailoring plasmonic fields with holograms,metallic particles can be manipulated without mechanical adjustments.Finite-difference timedomain simulations and Maxwell stress tensor calculations demonstrate the effectiveness of this technique,which offers simplicity,precision,and motionlessness in metallic particle manipulation.This advancement holds promise for applications in surface-enhanced Raman scattering,biosensing,super-resolved detection,and nanoparticle assembly,opening new avenues in plasmonic tweezers technology.

关 键 词：PARTICLE FIELDS SCATTERING 

分 类 号：O53[理学—等离子体物理] O43[理学—物理]