Spectroscopy of 3D-trapped particles inside a hollow-core microstructured optical fiber

We report on the demonstration of three-dimensional optical trapping inside the core of a hollow-core microstructured optical fiber specifically designed and fabricated for this purpose. Optical trapping was achieved by means of an external tweezers beam incident transversely on the fiber and focuse...

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Bibliographic Details
Published in:Optics express 2012-05, Vol.20 (10), p.11232-11240
Main Authors: Rajapakse, Charithra, Wang, Fan, Tang, Tiffany C Y, Reece, Peter J, Leon-Saval, Sergio G, Argyros, Alexander
Format: Article
Language:English
Subjects:
Equipment Design
Fiber Optic Technology
Imaging, Three-Dimensional
Light
Micromanipulation
Normal Distribution
Optical Fibers
Optical Tweezers
Optics and Photonics
Particle Size
Photobleaching
Refractometry
Spectrometry, Fluorescence - methods
Spectrophotometry - methods
Spectrum Analysis - instrumentation
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Summary:We report on the demonstration of three-dimensional optical trapping inside the core of a hollow-core microstructured optical fiber specifically designed and fabricated for this purpose. Optical trapping was achieved by means of an external tweezers beam incident transversely on the fiber and focused through the fiber cladding. Trapping was achieved for a range of particle sizes from 1 to 5 µm, and manipulation of the particles in three-dimensions through the entire cross-section of the fiber core was demonstrated. Spectroscopy was also performed on single fluorescent particles, with the fluorescence captured and guided in the fiber core. Video tracking methods allowed the optical traps to be characterized and photobleaching of single particles was also observed and characterized.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.20.011232