Journal
OPTICS LETTERS
Volume 34, Issue 10, Pages 1597-1599Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.34.001597
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- National Natural Science Foundation of China (NSFC) [60625404, 60577001]
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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, 1310 and 1550 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. (C) 2009 Optical Society of America
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