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We investigate the optical wave guiding properties of subwavelength-diameter liquid-core optical fibers (LOCFs) that are filled with high-refractive-index liquids. The single-mode condition, modal fields, nonlinear coefficient gamma, group velocities, and group velocity dispersions are studied theoretically. Compared with traditional silica subwavelength-diameter wires, subwavelength-diameter LOCFs show unique interesting properties, such as more confined guided-mode electrical fields and large nonlinear parameters gamma in the visible and infrared regions.
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Zhu et al. (2007) studied this question.
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