5 September 2007 Parametric excitation of optically trapped aerosols
Author Affiliations +
Proceedings Volume 6644, Optical Trapping and Optical Micromanipulation IV; 66441J (2007); doi: 10.1117/12.736448
Event: NanoScience + Engineering, 2007, San Diego, California, United States
Abstract
The Brownian dynamics of an optically trapped water droplet is investigated across the transition from over to under-damped 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 under-damped regime, we excite parametric resonance by periodically modulating the trapping power at twice the resonant frequency. We also derive from Langevin dynamics an explicit numerical recipe for the fast computation of the power spectra of a Brownian parametric oscillator. The obtained numerical predictions are in excellent agreement with the experimental data.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
R. Di Leonardo, G. Ruocco, J. Leach, M. J. Padgett, A. J. Wright, J. M. Girkin, D. R. Burnham, D. McGloin, "Parametric excitation of optically trapped aerosols", Proc. SPIE 6644, Optical Trapping and Optical Micromanipulation IV, 66441J (5 September 2007); doi: 10.1117/12.736448; https://doi.org/10.1117/12.736448
PROCEEDINGS
9 PAGES


SHARE
KEYWORDS
Modulation

Oscillators

Particles

Aerosols

Optical tweezers

Atmospheric particles

Liquids

RELATED CONTENT

Dye lasing in optically manipulated liquid aerosols
Proceedings of SPIE (September 12 2013)
Analysis of optical trap mediated aerosol coalescence
Proceedings of SPIE (October 10 2012)
Lidar-observed arctic PSCs over Svalbard
Proceedings of SPIE (February 13 2001)
Dynamics of airborne tweezing
Proceedings of SPIE (August 29 2008)
Catastrophes in locking systems driven by green noise
Proceedings of SPIE (May 07 2003)
Studies of droplet manipulation in optical traps
Proceedings of SPIE (September 05 2007)

Back to Top