Journal
OPTICS EXPRESS
Volume 28, Issue 24, Pages 35734-35747Publisher
Optica Publishing Group
DOI: 10.1364/OE.405884
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Funding
- National Natural Science Foundation of China [61975237, 11904405]
- Scientific Research Project of National University of Defense Technology [ZK20-14]
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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. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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