Analog Computing Using Reflective Plasmonic Metasurfaces

作者：Pors Anders^*; Nielsen Michael G; Bozhevolnyi Sergey I

来源：Nano Letters, 2015, 15(1): 791-797.

DOI：10.1021/nl5047297

• Metasurfaces
• plasmonics
• analog computing
• metamaterials
• gap surface plasmons

Motivated by the recent renewed interest in compact analog computing using light and metasurfaces (Silva, A. et al. Science 2014, 343, 160-163), we suggest a practical approach to its realization that involves reflective metasurfaces consisting of arrayed gold nanobricks atop a subwavelength-thin dielectric spacer and optically thick gold film, a configuration that supports gap-surface plasmon resonances. Using well-established numerical routines, we demonstrate that these metasurfaces enable independent control of the light phase and amplitude, and design differentiator and integrator metasurfaces featuring realistic system parameters. Proof-of-principle experiments are reported along with the successful realization of a high-quality poor-mans integrator metasurface operating at the wavelength of 800 nm.

• 出版日期2015-1