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Updated: Jun 23, 2026

Evaluating Plasmonic Transport in Current-carrying Silver Nanowires
Published on: December 11, 2013
Wavelength, cross-angle, and core-diameter dependence of coupling efficiency in nanowire evanescent wave coupling
Wen He1, Baojun Li, Edwin Yue-Bun Pun
1State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275, China.
Abstract:
We report a systematic study on the dependence of nanowire evanescent wave coupling efficiency on wavelength, cross angle, and core diameter. An 800 nm diameter silica taper was used for light launching. Three poly(trimethylene terephthalate) nanowires with 640 nm, 790 nm, and 950 nm diameters were used for light transmission. Five wavelengths (visible, 473, 532, 650 nm; near-IR, 1,310 and 1,550 nm) were used as transmission signals. The dependence of coupling efficiency was investigated at cross angles from 90 degrees to 0 degrees with a 5 degrees changing step. It is observed that the coupling efficiency is higher for longer wavelength of light, smaller cross angle, and smaller nanowire diameter.
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