Photonics Research, 2016, 4 (2): 02000065, Published Online: Sep. 28, 2016
Optical forces exerted on a graphene-coated dielectric particle by a focused Gaussian beam Download: 949次
Optical tweezers or optical manipulation Optical tweezers or optical manipulation Laser trapping Laser trapping Plasmonics Plasmonics Optical confinement and manipulation Optical confinement and manipulation
Abstract
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 polystyreneparticle, 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.61475186, and 11434017).
Yang Yang, Zhe Shi, Jiafang Li, Zhi-Yuan Li. Optical forces exerted on a graphene-coated dielectric particle by a focused Gaussian beam[J]. Photonics Research, 2016, 4(2): 02000065.