• Record: found
  • Abstract: found
  • Article: found
Is Open Access

Subwavelength focusing of light by a tapered microtube


Read this article at

      There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.


      We propose a mechanism for subwavelength focusing at optical frequencies based on the use of a tapered microtube fabricated from a glass capillary tube. Using coherent illumination at 671nm and a near-field scanning optical microscope probe which was mounted on a 3-axis piezo nanopositioning stage, a sequence of 2-D intensity profiles were obtained. Our experimental results reveal the smallest focal spot with a near diffraction-limited full width at half-maximum of ~435nm(0.65{\lambda})at a distance of ~1.47{\mu}m (2.2{\lambda}) from the output endface of microtube. The experimental results are in excellent agreement with our numerical simulation.

      Related collections

      Most cited references 1

      • Record: found
      • Abstract: not found
      • Article: not found

      Subwavelength focusing by a micro/nanofiber array

       Xiao Wang,  Jian Fu,  Xu Liu (2009)

        Author and article information

        18 June 2010
        1006.3619 10.1063/1.3472224

        Custom metadata
        3 pages, 3 figures


        Comment on this article