Journal
NANO LETTERS
Volume 17, Issue 8, Pages 5051-5055Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.7b02295
Keywords
Surface plasmon; holography; multiplexing; polarization
Categories
Funding
- National Key Research and Development Program of China [2017YFA0303700, 2016YFA0202103]
- National Natural Science Foundation of China [11674167, 11621091, 11322439]
- PAPD from Jiangsu Province
- Nanjing University
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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.
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