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Ultra-thin plasmonic metasurfaces based on carbon nanomembranes

: Sirmaci, Y.D.; Fasold, S.; Neumann, C.; Tang, Z.; Pertsch, T.; Turchanin, A.; Staude, I.


Institute of Electrical and Electronics Engineers -IEEE-:
Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference, CLEO/Europe-EQEC 2019 : 23-27 June 2019, Munich, Germany
Piscataway, NJ: IEEE, 2019
ISBN: 978-1-7281-0469-0
ISBN: 978-1-7281-0470-6
Conference on Lasers and Electro-Optics Europe (CLEO Europe) <2019, Munich>
European Quantum Electronics Conference (EQEC) <2019, Munich>
Conference Paper
Fraunhofer IOF ()

Summary form only given. Metasurfaces have been established as a viable platform for flat optical devices [1]. However, the optical metasurfaces realized so far were situated on a substrate having macroscale thickness. Naturally, substrates can alter the properties of the metasurfaces undesirably. They do not only degrade the ultra-thin nature of metasurfaces but can also create additional loss channels such as reflections. Consequently, a variety of platforms were suggested in order to create substrate-free metasurfaces [3]. However, none of the approaches demonstrated so far allows for the realization of optical metasurfaces with nanoscale thickness. Here, we experimentally demonstrate ultra-thin plasmonic metasurfaces consisting of square arrays of U-shaped gold nano-resonators [2] situated on Carbon Nanomembranes (CNMs) with a thickness of only 1.2 nm. Carbon nanomenbranes belong to the family of two-dimensional materials and they have insulating properties. Their thickness can be adjusted (0.5 to 3 nm) by the choice of employed precursor molecules [4].