Open AccessOptical confinement efficiency in the single beam intracavity optical tweezers
Author(s) -
Tengfang Kuang,
Wei Xiong,
Bin Luo,
Xinlin Chen,
Zijie Liu,
Xiang Han,
Guangzong Xiao,
Kun Yang,
Hui Luo
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.405884
Subject(s) - optical tweezers , optics , beam (structure) , numerical aperture , optical force , physics , optical path , materials science , wavelength
Single beam intracavity optical tweezers characterizes a novel optical trapping scheme where the laser operation is nonlinearly coupled to the motion of the trapped particle. Here, we first present and establish a physical model from a completely new perspective to describe this coupling mechanism, using transfer matrices to calculate the loss of the free-space optical path and then extracting the scattering loss that caused by the 3D motions of the particle. Based on this model, we discuss the equilibrium position in the single beam intracavity optical tweezers. The influences of the numerical aperture, pumping power, particle radius and refractive index on the optical confinement efficiency are fully investigated, compared with standard optical tweezers. Our work is highly relevant for guiding the experiments on the single beam intracavity optical tweezers to achieve higher optical confinement efficiency.