Analog Computing Using Reflective Plasmonic Metasurfaces

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• 作者：Anders Pors ; Michael G. Nielsen ; Sergey I. Bozhevolnyi
• 刊名：Nano Letters
• 出版年：2015
• 出版时间：January 14, 2015
• 年：2015
• 卷：15
• 期：1
• 页码：791-797
• 全文大小：464K
• ISSN：1530-6992

文摘

Motivated by the recent renewed interest in compact analog computing using light and metasurfaces (Silva, A. et al. Science 2014, 343, 160鈭?63), 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-man鈥檚 integrator metasurface operating at the wavelength of 800 nm.