A dark hollow beam from a selectively liquid-filled photonic crystal fibre |
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Authors: | Zhang Mei-Yan Li Shu-Guang Yao Yan-Yan Fu Bo and Zhang Lei |
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Institution: | Key Laboratory of Metastable Materials Science and Technology, College of Science, Yanshan University, Qinhuangdao 066004, China |
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Abstract: | This paper reports that, based on the electromagnetic
scattering theory of the multipole method, a high-quality hollow beam is
produced through a selectively liquid-filled photonic crystal fibre.
Instead of a doughnut shape, a typical hollow beam is produced by
other methods; the mode-field images of the hollow-beam photonic
crystal fibre satisfy sixth-order rotation symmetry, according to
the symmetry of the photonic crystal fibre (PCF) structure. A dark
spot size of the liquid-filled photonic crystal fibre-generated
hollow beam can be tuned by inserting liquid into the cladding region
and varying the photonic crystal fibre structure parameters. The
liquid-filled PCF makes a convenient and flexible tool for the
guiding and trapping of atoms and the creation of all-fibre optical
tweezers. |
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Keywords: | liquid-filled photonic crystal fibre fundamental mode dark hollow beam |
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