Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1534750 | Optics Communications | 2014 | 4 Pages |
Abstract
We report direct measurement of propagation losses in single gold nanowires around visible and near-infrared bands. By directly measuring the propagation-distance-dependent output of the nanowire via fiber-taper-assistant near-field-coupling technique, we obtain a typical loss of 0.89 dB/µm at 785-nm wavelength in a 210-nm-diameter gold nanowire. We have also investigated the dependences of propagation losses on the nanowire diameter and light wavelength, and shown that the propagation loss is averagely increased with decreasing diameter and wavelength. Our results from direct measurements offer an unambiguous loss information of gold nanowires, as well as a helpful reference for gold-nanowire-based plasmonic circuits and devices.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Xiyuan Li, Xin Guo, Delong Wang, Limin Tong,