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Near-field collimation of light carrying orbital angular momentum with bull's-eye-assisted plasmonic coaxial waveguides
Pu, Mingbo; Ma, Xiaoliang; Zhao, Zeyu; Li, Xiong; Wang, Yanqin; Gao, Hui; Hu, Chenggang; Gao, Ping; Wang, Changtao; Luo, Xiangang
Source PublicationSCIENTIFIC REPORTS
Volume5Pages:12108
2015
Language英语
ISSN2045-2322
DOI10.1038/srep12108
Indexed BySCI
WOS IDWOS:000357717300001
Subtype期刊论文
AbstractThe orbital angular momentum (OAM) of light, as an emerging hotspot in optics and photonics, introduces many degrees of freedom for applications ranging from optical communication and quantum processing to micromanipulation. To achieve a high degree of integration, optical circuits for OAM light are essential, which are, however, challenging in the optical regime owing to the lack of well-developed theory. Here we provide a scheme to guide and collimate the OAM beam at the micro-and nano-levels. The coaxial plasmonic slit was exploited as a naturally occurring waveguide for light carrying OAM. Concentric grooves etched on the output surface of the coaxial waveguide were utilized as a plasmonic metasurface to couple the OAM beam to free space with greatly increased beam directivity. Experimental results at lambda = 532 nm validated the novel transportation and collimating effect of the OAM beam. Furthermore, dynamic tuning of the topological charges was demonstrated by using a liquid crystal spatial light modulator (SLM).; The orbital angular momentum (OAM) of light, as an emerging hotspot in optics and photonics, introduces many degrees of freedom for applications ranging from optical communication and quantum processing to micromanipulation. To achieve a high degree of integration, optical circuits for OAM light are essential, which are, however, challenging in the optical regime owing to the lack of well-developed theory. Here we provide a scheme to guide and collimate the OAM beam at the micro-and nano-levels. The coaxial plasmonic slit was exploited as a naturally occurring waveguide for light carrying OAM. Concentric grooves etched on the output surface of the coaxial waveguide were utilized as a plasmonic metasurface to couple the OAM beam to free space with greatly increased beam directivity. Experimental results at lambda = 532 nm validated the novel transportation and collimating effect of the OAM beam. Furthermore, dynamic tuning of the topological charges was demonstrated by using a liquid crystal spatial light modulator (SLM).
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Document Type期刊论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/6886
Collection微细加工光学技术国家重点实验室(开放室)
Recommended Citation
GB/T 7714
Pu, Mingbo,Ma, Xiaoliang,Zhao, Zeyu,et al. Near-field collimation of light carrying orbital angular momentum with bull's-eye-assisted plasmonic coaxial waveguides[J]. SCIENTIFIC REPORTS,2015,5:12108.
APA Pu, Mingbo.,Ma, Xiaoliang.,Zhao, Zeyu.,Li, Xiong.,Wang, Yanqin.,...&Luo, Xiangang.(2015).Near-field collimation of light carrying orbital angular momentum with bull's-eye-assisted plasmonic coaxial waveguides.SCIENTIFIC REPORTS,5,12108.
MLA Pu, Mingbo,et al."Near-field collimation of light carrying orbital angular momentum with bull's-eye-assisted plasmonic coaxial waveguides".SCIENTIFIC REPORTS 5(2015):12108.
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