Rotational dynamics and heating of trapped nanovaterite particles

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

Research output: Contribution to journalArticle

19 Citations (Scopus)
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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.
Original languageEnglish
Pages (from-to)11505-11510
Number of pages6
JournalACS Nano
Volume10
Issue number12
DOIs
Publication statusPublished - 27 Dec 2016

Keywords

  • birefringence
  • hydrodynamics
  • optical torque
  • optical trapping
  • photothermal effect
  • spin angular momentum
  • vaterite

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