Midinfrared Surface Plasmons in Carbon Nanotube Plasmonic Metasurface

Abstract

Carbon nanomaterials are now in the spotlight because of their prospective applications in photonics and optoelectronics. Although graphene metasurfaces and individual carbon nanotubes (CNTs) have been shown to be active plasmonic materials, studies of the plasmonic properties of CNT thin films are lacking. The authors demonstrate that a free-standing metasurface made of a film of single-walled CNTs supports propagation of surface plasmons in the technologically interesting midinfrared range. This result should be particularly useful for developing CNT-based photodetectors and photonic devices.