期刊
SCIENCE
卷 358, 期 6365, 页码 896-900出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aao5392
关键词
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资金
- Air Force Office of Scientific Research [FA9550-14-1-0389, FA9550-16-1-0156]
- Charles Stark Draper Laboratory
- NSF Graduate Research Fellowship Program (GRFP) [DGE1144152]
- National Science Foundation under NSF [1541959]
Optical elements that convert the spin angular momentum (SAM) of light into vortex beams have found applications in classical and quantum optics. These elements-SAM-toorbital angular momentum (OAM) converters-are based on the geometric phase and only permit the conversion of left-and right-circular polarizations (spin states) into states with opposite OAM. We present a method for converting arbitrary SAM states into total angular momentum states characterized by a superposition of independent OAM. We designed a metasurface that converts left-and right-circular polarizations into states with independent values of OAM and designed another device that performs this operation for elliptically polarized states. These results illustrate a general material-mediated connection between SAM and OAM of light and may find applications in producing complex structured light and in optical communication.
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