title: Rotational Dynamics and Heating of Trapped Nanovaterite Particles.
abstract: We synthesize, 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 behavior 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 need to be modified with appropriate correction factors to account for the power dissipated by the nanoparticle.
authors.affiliation: SUPA, School of Physics and Astronomy, University of St. Andrews , North Haugh, St. Andrews KY16 9SS, United Kingdom.|Molecular Chirality Research Center, Graduate School of Advanced Integration Science, Chiba University , 1-33 Yayoi, Inage, Chiba 263-0022, Japan.
authors.forename: Yoshihiko
authors.identifier: 0000-0002-8704-545X
authors.initials: Y
authors.lastname: Arita
authors.affiliation: Illinois Wesleyan University , Bloomington, Illinois 61701, United States.
authors.forename: Joseph M
authors.initials: JM
authors.lastname: Richards
authors.affiliation: SUPA, School of Physics and Astronomy, University of St. Andrews , North Haugh, St. Andrews KY16 9SS, United Kingdom.
authors.forename: Michael
authors.initials: M
authors.lastname: Mazilu
authors.affiliation: Illinois Wesleyan University , Bloomington, Illinois 61701, United States.
authors.forename: Gabriel C
authors.initials: GC
authors.lastname: Spalding
authors.affiliation: SUPA, School of Physics and Astronomy, University of St. Andrews , North Haugh, St. Andrews KY16 9SS, United Kingdom.
authors.forename: Susan E
authors.initials: SE
authors.lastname: Skelton Spesyvtseva
authors.affiliation: SUPA, School of Physics and Astronomy, University of St. Andrews , North Haugh, St. Andrews KY16 9SS, United Kingdom.
authors.forename: Derek
authors.initials: D
authors.lastname: Craig
authors.affiliation: SUPA, School of Physics and Astronomy, University of St. Andrews , North Haugh, St. Andrews KY16 9SS, United Kingdom.|Molecular Chirality Research Center, Graduate School of Advanced Integration Science, Chiba University , 1-33 Yayoi, Inage, Chiba 263-0022, Japan.
authors.forename: Kishan
authors.initials: K
authors.lastname: Dholakia
keywords: birefringence; hydrodynamics; optical torque; optical trapping; photothermal effect; spin angular momentum; vaterite