Parametric resonance of optically trapped aerosols

Di Leonardo, R., Ruocco, G., Leach, J., Padgett, M.J. , Wright, A.J., Girkin, J.M., Burnham, D.R. and McGloin, D. (2007) Parametric resonance of optically trapped aerosols. Physical Review Letters, 99(1), (doi: 10.1103/PhysRevLett.99.010601)

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The Brownian dynamics of an optically trapped water droplet are investigated across the transition from over- to underdamped oscillations. The spectrum of position fluctuations evolves from a Lorentzian shape typical of overdamped systems (beads in liquid solvents) to a damped harmonic oscillator spectrum showing a resonance peak. In this later underdamped regime, we excite parametric resonance by periodically modulating the trapping power at twice the resonant frequency. The power spectra of position fluctuations are in excellent agreement with the obtained analytical solutions of a parametrically modulated Langevin equation.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Padgett, Professor Miles
Authors: Di Leonardo, R., Ruocco, G., Leach, J., Padgett, M.J., Wright, A.J., Girkin, J.M., Burnham, D.R., and McGloin, D.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review Letters
Journal Abbr.:Phys. Rev. Lett.
Publisher:American Physical Society
ISSN (Online):1079-7114

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
379181The Abraham vs Minowski dilemma - an experimental resolution?Miles PadgettEngineering & Physical Sciences Research Council (EPSRC)EP/C533488/1Physics and Astronomy