Optical fiber nano-tip and 3D bottle beam as non-plasmonic optical tweezers

Mondal, S.K. and Pal, S.S. and Kapur, Pawan (2012) Optical fiber nano-tip and 3D bottle beam as non-plasmonic optical tweezers. Optics Express, 20 (15). pp. 16180-16185. ISSN 1094-4087

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We report a simple fiber nano-tip as non-plasmonic optical tweezer, which can manipulate submicron particles in a non-contact manner. The efficiency of an optical tweezer can be enhanced by using nondiffracting type optical beams such as Bessel beam or self-imaged Bessel beam (3D bottle beam). The present work, for the first time, realizes a nonplasmonic optical tweezer based on a miniaturized axicon like single-mode optical fiber nano-tip. The tip generates non-diffracting type 3D bottle beam by virtue of its changing wedge angle. The nano-tip is prepared from a photosensitive single-mode optical fiber by employing a novel chemical etching technique. We experimentally demonstrate trapping of ~60 nm silver particle and ~160 nm silica particle using this nano-tip optical tweezer. The nano-tweezer also succeeds to pick up the particles from aqueous solution. The proposed nano-tweezer working at smaller laser powers opens new avenues for nanomanipulation and analysis of submicroscale specimens in the biological and physical sciences.

Item Type: Article
Subjects: CSIO > Optics
CSIO > Photonics Instrumentation
Divisions: Photonics Instrumentation
Depositing User: Ms. J Shrivastav
Date Deposited: 25 Feb 2013 06:20
Last Modified: 25 Feb 2013 06:20
URI: http://csioir.csio.res.in/id/eprint/343

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