Full Color Angular Filtering of Visible Transmission in Tapered Plasmonic Metamaterial


Flat nanophotonic devices hold a great potential to process diffractive optical information within ultra-thin submicron thickness. In particular, optical filtering of transmissive angular spectrum in the free space is an essential functionality in diffractive optics. Here, we propose a novel configuration and theoretical study of an ultrathin transmissive angular filtering metamaterial for the first time to the best of our knowledge. Based on the adiabatically tapered plasmonic waveguide metamaterial in the visible regime, full color angle-selective transmission is achieved near the optic axis including the representative blue (473 nm), green (532 nm), and red (633 nm) colors. By providing further analysis on bandwidth extension, we envision that the proposed flat angular filtering mechanism in the visible range promises practical value and potential for a variety of metamaterial-assisted compact diffractive imaging and sensing applications such as augmented or virtual reality displays and biomedical optical sensors.

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The authors acknowledge support from the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science and ICT (No. 2020R1A2B5B02002730) and the BK21 Plus Project in 2020.

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The data that support the findings of this study are available from the corresponding author upon reasonable request.

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S.-J. K. conceived the ideas, conducted theoretical and numerical studies, and prepared the draft of the paper. J. H., S. M., and J.-G. Y. helped the analysis on the results. B. L. initiated and supervised the whole project. All authors participated in preparation of the final version of the manuscript.

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Correspondence to Byoungho Lee.

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Kim, SJ., Hong, J., Moon, S. et al. Full Color Angular Filtering of Visible Transmission in Tapered Plasmonic Metamaterial. Plasmonics 16, 115–121 (2021). https://doi.org/10.1007/s11468-020-01263-y

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  • Flat optics
  • Angular selectivity
  • Optical filter
  • Surface plasmon polariton
  • Metamaterial
  • Plasmonic waveguide