International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2570

Full Length Research Paper

Generation of surface optical vortices by evanescent Bessel beams

S. Al-Awfi* and S. Bougouffa      
Department of Physics, Taibah University, P. O. Box 30002, Madinah, Saudi Arabia.  
Email: [email protected]

  •  Accepted: 30 May 2012
  •  Published: 29 June 2012

Abstract

We present that a set of high order Bessel beams  when internally reflected at a dielectric/vacuum interface can create distinct evanescent light modes in each of which the intensity distribution is restricted to a sub-wavelength region near the interface outside the dielectric. We believe that this could really facilitate lateral optical manipulation of nano-particles and neutral atoms along the interface. Similarly, the set-up could lead to the formation of two-dimensional surface optical vortices that possibly will give rise to attractive phenomena, including pattern rotation liken to a surface optical Ferris wheel. Applications are envisaged to be in atom lithography, optical surface tweezers, and spanners.

 

Key words: Bessel beam, optical surface tweezers, optical surface spanners.