3 years ago

Multiplexed Holograms by Surface Plasmon Propagation and Polarized Scattering

Multiplexed Holograms by Surface Plasmon Propagation and Polarized Scattering
Shining Zhu, Shuming Wang, Tao Li, Ji Chen
Thanks to the superiority in controlling the optical wave fronts, plasmonic nanostructures have led to various striking applications, among which metasurface holograms have been well developed and endowed with strong multiplexing capability. Here, we report a new design of multiplexed plasmonic hologram, which allows for reconstruction of multiple holographic images in free space by scatterings of surface plasmon polariton (SPP) waves in different propagation directions. Besides, the scattered polarization states can be further modulated by arranging the orientations of nanoscatterers. By incorporation of the SPP propagation and polarized scattering, a 4-fold hologram with low crosstalk is successfully demonstrated, which breaks the limitation of only two orthogonal states in conventional polarization multiplexers. Moreover, our design using the near-field SPP as reference wave holds the advantage for compact integration. This holographic approach is expected to inspire new photonic designs with enhanced information capacity and integratability.

Publisher URL: http://dx.doi.org/10.1021/acs.nanolett.7b02295

DOI: 10.1021/acs.nanolett.7b02295

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