A Plasmonic Infrared Multiple-Channel Filter Based on Gold Composite Nanocavities Metasurface

Abstract

A plasmonic near-infrared multiple-channel filter is numerically and experimentally investigated based on a gold periodic composite nanocavities metasurface. By the interference among different excited plasmonic modes on the metasurface, the multipeak extraordinary optical transmission (EOT) phenomenon is induced and utilized to realize multiple-channel filtering. Investigated from the simulated transmission spectrum of the metasurface, the positions and intensity of transmission peaks are tuned by the geometrical parameters of the metasurface and environmental refractive index. The fabricated metasurface approached transmission peaks at 1128 nm, 1245 nm, and 1362 nm, functioning as a three-passbands filter. With advantages of brief single-layer fabrication and multi-frequency selectivity, the proposed plasmonic filter has potential possibilities of integration in nano-photonic switching, detecting and biological sensing systems.

High-Performance Asymmetric Optical Transmission Based on a Dielectric–Metal Metasurface

“…Fortunately, the emergence of metamaterial provides an appealing alternative to control electromagnetic wave manipulations properties [12][13][14][15][16][17], and the discovery of the AT phenomenon based on metamaterial was first experimentally demonstrated in the microwave region by Fedotov et al in 2006 [18]. Since then, various AT devices based on artificial structures have been proposed which use photonic crystals [19,20], subwavelength asymmetric gratings [21][22][23][24], chiral metamaterials [25][26][27] and metasurfaces [28][29][30], and the operation wavelengths have been covered from microwave to visible light [31][32][33].…”

A Mid-Infrared Multifunctional Optical Device Based on Fiber Integrated Metasurfaces

“…In recent years, there has been tremendous innovation in optics and photonics with the advent of the metasurface, a periodic arrangement structure of multiple units on a two-dimensional plane that can be used to tune electromagnetic waves [1,2]. Various metasurfaces have been designed on subwavelength dimension cells to modulate the phase, polarization mode, and propagation pattern of electromagnetic waves.…”