Rotational dynamics and heating of trapped nanovaterite particles

Arita, Yoshihiko; Richards, Joseph M.; Mazilu, Michaël; Spalding, Gabriel C.; Spesyvtseva, Susan E. Skelton; Craig, Derek; Dholakia, Kishan

doi:10.1117/12.2275291

Cited by 11 publications

(32 citation statements)

References 10 publications

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“…We note that it has been suggested, both experimentally and theoretically, by previous studies that the medium temperature probed by the dynamics of a particle can yield different temperature depending on whether the rotational or translational motion is considered. 15,21 Moreover, the internal temperature of the particle is typically higher than the temperature of the surrounding medium.…”

Section: Resultsmentioning

confidence: 99%

“…15,[33][34][35] Therefore, this non-equilibrium steady state affects the Brownian dynamics of the particle depending upon whether the rotational or translational degree of freedom is under consideration. 15,21,34,35 When rotating, the particle dynamics are affected by the liquid in close proximity to it which is at a temperature close to its internal, whereas when it translates the particle explores regions at a lower temperature.…”

Section: Resultsmentioning

confidence: 99%

“…We stress that the rotation rate and trap stiffness methods described below are independent of particle size and shape distinguishing this approach from previous, established routes for determination of CoM temperature. 10,14,15,21 Luminescence method. This method obtains a value of the thermal loading (C P I ) from the changes in the intensity ratio ( I 2 I 1 ) of the two temperature-dependent emission bands:…”

Section: Methodsmentioning

confidence: 99%

“…, which is also dependent on T 21,26 and therefore provides a way to measure temperature. Correct determination of the trap stiffness requires knowledge of the thermal loading (C P κ ).…”

Section: Methodsmentioning

confidence: 99%

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The Temperature of an Optically Trapped, Rotating Microparticle

et al. 2018

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…, which is also dependent on T 21,26 and therefore provides a way to measure temperature. Correct determination of the trap stiffness requires knowledge of the thermal loading (C P κ ).…”

Section: Methodsmentioning

confidence: 99%

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The Temperature of an Optically Trapped, Rotating Microparticle

et al. 2018

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“…We have used finite element method (implemented in COMSOL R ) to calculate the overall drag torque or drag force for different residual optical absorption powers. 24 Assuming the 8 proportionality of optical torque (blue dashed line in Fig. 3a) and trap stiffness (green dashed line in Fig.…”

Section: Resultsmentioning

confidence: 99%

Rotational Dynamics and Heating of Trapped Nanovaterite Particles

et al. 2016

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We synthesise, optically trap and rotate individual nanovaterite crystals with a mean particle radius of 423 nm. Rotation rates of up to 4.9 kHz in heavy water are recorded. Laser-induced heating due to residual absorption of the nanovaterite particle results in the superlinear behaviour of the rotation rate as a function of trap power. A finite element method based on the Navier-Stokes model for the system allows us to determine the residual optical absorption coefficient for a trapped nanovaterite particle. This is further confirmed by the theoretical model. Our data show that the translational Stokes drag force and rotational Stokes drag torque needs to be modified with appropriate correction factors to account for the power dissipated by the nanoparticle.

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Dynamic Analysis and Simulation of an Optically Levitated Rotating Ellipsoid Rotor in Liquid Medium

Zhu

et al. 2021

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Optical trap, a circularly polarized laser beam can levitate and control the rotation of microspheres in liquid medium with high stiffness. Trapping force performs as confinement while the trapped particle can be analog to a liquid floated gyroscope with three degree-of-freedom. In this work, we analyzed the feasibility of applying optically levitated rotor in the system. We presented the dynamic analysis and simulation of an ellipsoid micron particle. The precession motion and nutation motion of a rotating ellipsoid probe particle in optical tweezers were performed. We also analyzed the attitude changes of an optically levitated ellipsoid when there was variation of the external torque caused by deviation of the incident light that was provided. Furthermore, the trail path of the rotational axis vertex and the stabilization process of a particle of different ellipticities were simulated. We compared the movement tendencies of particles of different shapes and analyzed the selection criteria of ellipsoid rotor. These analytical formulae and simulation results are applicable to the analysis of the rotational motion of particles in optical tweezers, especially to the future research of the gyroscope effect.

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Rotational dynamics and heating of trapped nanovaterite particles

Cited by 11 publications

References 10 publications

The Temperature of an Optically Trapped, Rotating Microparticle

The Temperature of an Optically Trapped, Rotating Microparticle

Rotational Dynamics and Heating of Trapped Nanovaterite Particles

Dynamic Analysis and Simulation of an Optically Levitated Rotating Ellipsoid Rotor in Liquid Medium

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