期刊
NANO LETTERS
卷 14, 期 5, 页码 2726-2729出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl500658n
关键词
Optical vortex; cylindrical nanowaveguide; phase control; orbital angular momentum
类别
资金
- U.S. Army Research Office Award [W911NF-11-1-0333]
Light beams with orbital angular momentum have significant potential to transform many areas of modern photonics from imaging to classical and quantum communication systems. We design and experimentally demonstrate an ultracompact array of nanowaveguides with a circular graded distribution of channel diameters that coverts a conventional laser beam into a vortex with an orbital angular momentum. The proposed nanoscale beam converter is likely to enable a new generation of on-chip or all-fiber structured light applications.
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