Behavior Analysis of a Gaussian Beam Optical Trap in the Rayleigh Regime

Niazul Islam Khan, A. S. M. Abdul Hye, M. D. Rejwanur Rashid Mojumdar, S. K. Shaid-Ur Rahman

Abstract

Recently optical trapping has emerged as a very powerful tool for manipulating micro and nanometer sized particles. In this paper, we present a comprehensive study of the behavior of nanometer sized trapped particles in a Gaussian beam optical trap using Rayleigh model of trapping forces. Along with the working principle of an optical trap, the force equations in the Rayleigh regime have been derived considering focused Gaussian beam. Then numerical simulations are performed for a 30 nm particle with refractive index 1.57 considering water as the surrounding medium. We assume that the wavelength of the light source to be 850 nm easily obtainable from cheap GaAs-based vertical-cavity surface-emitting laser technology. When the light hits a particle, it influences the particle with two forces–the scattering force in the direction of propagation and the gradient force in the direction of gradient of light intensity. We explore the effects of particle size, refractive index of the particle, beam waist radius, position of the particle with respect to the trap center both on scattering and gradient forces. This analysis will be helpful for understanding optical manipulation of nanoparticles and designing suitable trap modules for nanoparticle manipulation.

References

  1. Ashkin, A. (1997). Optical trapping and manipulation of neutral particles using lasers. In Proc. Natl. Acad. Sci. USA, Vol. 94, pp. 4853-4860. The National Academy of Sciences of the USA.
  2. Malagino, N., Pesce, G., Sasso, A., and Arimondo, E. (2002). Measurements of trapping efficiency and stiffness in optical tweezer. In Optics Communications, Vol. 214, pp. 15-24. Elsevier.
  3. Neuman, K. C. and Block, S. M. (2004). Optical trapping. In Rev. of Sci. Instrumentations, Vol. 75, no. 9, pp. 2787-2807. American Institute of Physics.
  4. Schaevitz, J. W. (2006). A practical guide to optical trapping. Technical report.
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Paper Citation


in Harvard Style

Islam Khan N., S. M. Abdul Hye A., D. Rejwanur Rashid Mojumdar M. and K. Shaid-Ur Rahman S. (2012). Behavior Analysis of a Gaussian Beam Optical Trap in the Rayleigh Regime . In Proceedings of the International Conference on Data Communication Networking, e-Business and Optical Communication Systems - Volume 1: OPTICS, (ICETE 2012) ISBN 978-989-8565-23-5, pages 365-370. DOI: 10.5220/0004063803650370


in Bibtex Style

@conference{optics12,
author={Niazul Islam Khan and A. S. M. Abdul Hye and M. D. Rejwanur Rashid Mojumdar and S. K. Shaid-Ur Rahman},
title={Behavior Analysis of a Gaussian Beam Optical Trap in the Rayleigh Regime},
booktitle={Proceedings of the International Conference on Data Communication Networking, e-Business and Optical Communication Systems - Volume 1: OPTICS, (ICETE 2012)},
year={2012},
pages={365-370},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0004063803650370},
isbn={978-989-8565-23-5},
}


in EndNote Style

TY - CONF
JO - Proceedings of the International Conference on Data Communication Networking, e-Business and Optical Communication Systems - Volume 1: OPTICS, (ICETE 2012)
TI - Behavior Analysis of a Gaussian Beam Optical Trap in the Rayleigh Regime
SN - 978-989-8565-23-5
AU - Islam Khan N.
AU - S. M. Abdul Hye A.
AU - D. Rejwanur Rashid Mojumdar M.
AU - K. Shaid-Ur Rahman S.
PY - 2012
SP - 365
EP - 370
DO - 10.5220/0004063803650370