Journal
PLASMONICS
Volume 12, Issue 3, Pages 863-868Publisher
SPRINGER
DOI: 10.1007/s11468-016-0336-9
Keywords
Graphene; Plasmons vortex; Nanoantennas
Funding
- National Natural Science Foundation of China (NSFC) [61178008, 61275092]
- Fundamental Research Funds for the Central Universities, China
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In this paper, we propose a method of creating plasmons vortex on graphene through cross shape nanoantennas under linearly polarized incidence. For each cross shape antenna, the linearly polarized incidence can be coupled to a near-field plasmons vortex on graphene through antenna resonances. When multiple antennas are arranged into a closed circular array, the sign of topological charge of plasmons vortex can be controlled by the linearly polarized direction of incident light with the distribution of absolute field component exhibiting a non-ideal donut profile. The creating of plasmons vortex on graphene may provide new possibilities in various applications, such as the nanoparticles trapping.
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