Determinations of angular stiffness in rotational optical tweezers Article Swipe
Watson, Mark L.
,
Stilgoe, Alexander B.
,
Rubinsztein-Dunlop, Halina
·
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2512.07414
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2512.07414
Rotational optical tweezers are used to probe the mechanical properties of unknown microsystems. Quantifying the angular trap stiffness is essential for interpreting the rotational dynamics of probe particles. While methods for trap stiffness calibration are well established for translational degrees of freedom, angular trapping has been largely overlooked and is often assumed to behave analogously to translational dynamics. However, rotational and translational motions are sensitive to distinct experimental parameters and offer separate insights. This work covers passive analysis techniques for calibrating the angular trap stiffness and examines the influence of several factors unique to rotational optical tweezers. We show that the parameters of an ancillary measurement beam can be tuned to minimise its influence on angular trapping dynamics, while offering unprecedented improvements for nanoparticle analysis. We also explore the combined effects of shape-induced and material birefringence in spheroidal vaterite probes, and present a framework for assessing hydrodynamic and inertial contributions. These results provide a foundation for characterising rotational optical tweezers independent from translational models.
Related Topics
Concepts
Optical tweezers
Angular displacement
Stiffness
Trapping
Angular velocity
Rotation around a fixed axis
Birefringence
Optics
Physics
Rotation (mathematics)
Optical force
Work (physics)
Calibration
Tweezers
Rotational spectrum
Angular momentum
Light beam
Materials science
Microfluidics
Rotational transition
Trap (plumbing)
Mechanics
Inertial frame of reference
Angular acceleration
Beam (structure)
Rotational dynamics
Classical mechanics
Rotational speed
Superposition principle
Rotational energy
Metadata
- Type
- preprint
- Landing Page
- https://doi.org/10.48550/arxiv.2512.07414
- OA Status
- green
- OpenAlex ID
- https://openalex.org/W7111035872
All OpenAlex metadata
Raw OpenAlex JSON
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https://openalex.org/W7111035872Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.48550/arxiv.2512.07414Digital Object Identifier
- Title
-
Determinations of angular stiffness in rotational optical tweezersWork title
- Type
-
preprintOpenAlex work type
- Publication year
-
2025Year of publication
- Publication date
-
2025-12-08Full publication date if available
- Authors
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Watson, Mark L., Stilgoe, Alexander B., Rubinsztein-Dunlop, HalinaList of authors in order
- Landing page
-
https://doi.org/10.48550/arxiv.2512.07414Publisher landing page
- Open access
-
YesWhether a free full text is available
- OA status
-
greenOpen access status per OpenAlex
- OA URL
-
https://doi.org/10.48550/arxiv.2512.07414Direct OA link when available
- Concepts
-
Optical tweezers, Angular displacement, Stiffness, Trapping, Angular velocity, Rotation around a fixed axis, Birefringence, Optics, Physics, Rotation (mathematics), Optical force, Work (physics), Calibration, Tweezers, Rotational spectrum, Angular momentum, Light beam, Materials science, Microfluidics, Rotational transition, Trap (plumbing), Mechanics, Inertial frame of reference, Angular acceleration, Beam (structure), Rotational dynamics, Classical mechanics, Rotational speed, Superposition principle, Rotational energyTop concepts (fields/topics) attached by OpenAlex
- Cited by
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0Total citation count in OpenAlex
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