Affiliation:
1. Indiana University Bloomington
Abstract
Orbital dynamics of a dielectric microparticle in air using a lensed
counter-propagating dual-beam trap was studied experimentally and by
numerical simulations. Relationships between the dynamic parameters,
trap geometry, and optical power were examined both experimentally and
computationally. We found that this scheme can provide narrow
bandwidth (
δ
ν
/
ν
≈
10
−
3
) detection that is at least two
orders of magnitude below typical values attainable with previously
studied geometries. We predict that this characteristic makes the
approach suitable for ultrasensitive in-situ detection of particle
mass changes. In our experimental conditions, silica microspheres
orbited on trajectories spanning tens of µm, at frequencies of up to
∼
2
k
H
z
, at atmospheric pressure. With the
help of simulations, we briefly discuss how the dual-beam lensed
orbital trap approach can be further enhanced to gain unmatched
capabilities to measure changes in the physical parameters associated
with a particle interacting with its surrounding medium.
Subject
Computer Vision and Pattern Recognition,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Cited by
2 articles.
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1. Welcoming 2024: editorial;Journal of the Optical Society of America A;2024-01-30
2. 2022 JOSA A Emerging Researcher Best Paper Prize: editorial;Journal of the Optical Society of America A;2023-05-23