High-performance polarization beam splitter based on anisotropic plasmonic nanostructures
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We propose an alternative design of efficient and compact polarization beam splitters for wide-angle and polarization-sensitive incidence of electromagnetic waves at near-infrared frequencies. The designed system is constructed by depositing periodic metallic strips on top and bottom of a continuous metal film. Based on the optimization of structure parameters, the whole system can suppress transmission (~ 0%) for one polarization and enhance transmission for another polarization (~ 95%). This phenomenon of anisotropic transmission can be attributed to different performances of impedance along different polarization directions. This device may find applications in optical components and polarization filter.
This work was supported by the National Natural Science Foundation of China (Grant Nos. 11504305 and 61601393).
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