期刊
OPTICS LETTERS
卷 40, 期 10, 页码 2293-2296出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.40.002293
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资金
- National Natural Science Foundation of China [11404403, 11304389, 61205141]
- Australian Research Council [FT110100037]
- Australian Research Council [FT110100037] Funding Source: Australian Research Council
By studying the scattering of normally incident plane waves by a single nanowire, we reveal the indispensable role of toroidal multipole excitation in multipole expansions of radiating sources. It is found that for both p-polarized and s-polarized incident waves, toroidal dipoles can be effectively excited within homogenous dielectric nanowires in the optical spectrum regime. We further demonstrate that the plasmonic core-shell nanowires can be rendered invisible through destructive interference of the electric and toroidal dipoles, which may inspire many nano-wire-based light-matter interaction studies, and incubate biological and medical applications that require non-invasive detections and measurements. (C) 2015 Optical Society of America
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