Reconfigurable sensor and nanoantenna by graphene-tuned Fano resonance

Area of Science:

• Nanotechnology
• Electromagnetics
• Materials Science

Background:

• Compact devices require multi-functional and reconfigurable nanostructures, which are challenging to design.
• Current devices are often mono-functional or lack easy switching between functions.

Purpose of the Study:

• To propose graphene-wrapped core-shell nanowires for real-time reconfigurable sensors and nanoantennas.
• To demonstrate dynamic control of electromagnetic properties through Fermi energy tuning.

Main Methods:

• Utilized graphene-wrapped core-shell nanowires.
• Tuned Fermi energies of surface graphene layers to control electromagnetic coupling.
• Analyzed Terahertz spectrum for Fano resonances and scattering properties.

Main Results:

• Achieved two Fano resonances in the Terahertz spectrum due to electromagnetic coupling between graphene layers.
• Demonstrated resonant scattering for nanoantenna function and suppressed scattering for sensor function.
• Observed distinct field distributions at suppressed scattering states for the two Fano resonances.

Conclusions:

• The proposed nanostructures offer real-time reconfigurability for sensors and nanoantennas.
• This design enables multi-functional electromagnetic control, including dynamic sensing and emission.
• Presents promising potential for integrated and advanced electromagnetic applications.