Optimal Position Detection of an Optically Levitated Mie Particle

We theoretically investigate the problem of position detection of an optically levitated Mie particle. The information radiation field (IRF) is proposed and defined to characterize the scattered light carrying complete information about the center-of-mass (c.m.) motion of the particle. Based on the...

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Bibliographic Details
Published in:arXiv.org 2024-08
Main Authors: Wang, Long, Lei-Ming, Zhou, Tian, Yuan, Liu, Lyu-Hang, Guo, Guang-Can, Fang-Wen, Sun, Zheng, Yu
Format: Article
Language:English
Subjects:
Gaussian beams (optics)
Motion perception
Numerical aperture
Three dimensional motion
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Summary:We theoretically investigate the problem of position detection of an optically levitated Mie particle. The information radiation field (IRF) is proposed and defined to characterize the scattered light carrying complete information about the center-of-mass (c.m.) motion of the particle. Based on the IRF, we suggest an optimal detection scheme for the position of arbitrary particles. We calculate both the information losses of objective collection and mode-matching in levitated optomechanical experiments. Our results conclude that the backward detection scheme, using an incident Gaussian beam focused by a high numerical aperture lens, provides sufficient information to achieve the quantum ground state through cooling of the three-dimensional c.m. motion of the Mie particle.
ISSN:2331-8422