Optical forces exerted on a graphene-coated dielectric particle by a focused Gaussian beam

作     者：Yang Yang Zhe Shi Jiafang Li Zhi-Yuan Li 

作者机构：Laboratory of Optical Physics Institute of Physics Chinese Academy of Sciences Key Laboratory of Micro-Nano Measurement-Manipulation and Physics (Ministry of Education) Beihang University 

出 版 物：《Photonics Research》 (光子学研究（英文版）)

年 卷 期：2016年第4卷第2期

页      面：65-69页

核心收录：

学科分类：081704[工学-应用化学] 070207[理学-光学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：supported by the National 973 Program of China(Nos.2013CB632704 and 2013CB922404) the National Natural Science Foundation of China(Nos.11374357,61475186,and 11434017) 

主　　题：Optical forces exerted on a graphene coated dielectric particle by a focused Gaussian beam 

摘      要：In this paper, we derive the analytical expression for the multipole expansion coefficients of scattering and interior fields of a graphene-coated dielectric particle under the illumination of an arbitrary optical beam. By using this arbitrary beam theory, we systematically investigate the optical forces exerted on the graphene-coated particle by a focused Gaussian beam. Via tuning the chemical potential of the graphene, the optical force spectra could be modulated accordingly at resonant excitation. The hybridized whispering gallery mode of the electromagnetic field inside the graphene-coated polystyrene particle is more intensively localized than the pure polystyrene particle, which leads to a weakened morphology-dependent resonance in the optical forces. These investigations could open new perspectives for dynamic engineering of optical manipulations in optical tweezers applications.