Active control of thermal emission by graphene-nanowire coupled plasmonic metasurfaces

Abstract

Metasurfaces, together with graphene plasmonics, have become prominent for the emissivity control in thermal engineering, both passively through changing the geometric parameters and packing density of the metasurfaces, and actively through graphene gating or doping. We demonstrate a graphene-nanowire coupled plasmonic metasurface utilizing the hybrid localized surface plasmon modes of the nanowire array and graphene. The nanowire array makes the hybrid surface plasmon mode localized, allowing a free-space excitation. The single layer graphene, via the gating between the underneath mirror and a top electrode, can actively tune the spectral emissivity by almost 90%. In addition, the hybrid plasmon mode provides an extra degree of freedom to modulate the p-polarized emissivity with a five-fold enhancement, especially for large emission angles.

7 pages, 7 figures. Accepted by Physical Review B on Sep. 1st, 2022

References in corpus (5)

• Dyadic Green's Functions and Guided Surface Waves for a Surface Conductivity Model of Graphene
• Controlling electron-phonon interactions in graphene at ultra high carrier densities
• Mid-infrared plasmons in scaled graphene nanostructures
• Electronic modulation of infrared emissivity in graphene plasmonic resonators
• Infrared Frequency-Tunable Coherent Thermal Sources

Cited by in corpus (4)

• Controlling thermal emission with metasurfaces and its applications
• Electrically Driven Thermal Infrared Metasurface with Narrowband Emission
• Accurate Direct Measurements of Far-Field Thermal Infrared Emission and its Dynamics
• Design and analysis of electrothermal metasurfaces