Nonlinear temporal dynamics in multifunctional nanoantenna with asymmetry.

Area of Science:

• Nonlinear Nanophotonics
• Metamaterials
• Optical Engineering

Background:

• Nanoantennas are crucial for manipulating light at the nanoscale.
• Existing designs often lack multifunctionality and tunable control.
• Graphene's unique electronic properties offer potential for advanced optical devices.

Purpose of the Study:

• To introduce a novel concept for a multifunctional nonlinear nanoantenna.
• To theoretically investigate the temporal dynamics of an asymmetric graphene-based nanoantenna system.
• To explore the potential for enhanced multistability and tunable optical switching.

Main Methods:

• Theoretical modeling of temporal dynamics.
• Analysis of an asymmetric system comprising graphene-wrapped dielectric nanoparticles.
• Investigation of tunable Fermi energies in the graphene components.

Main Results:

• Asymmetry significantly enlarges the stationary multistable regime compared to symmetric counterparts.
• The asymmetric system exhibits richer temporal dynamical behaviors.
• Demonstrated ability to switch between nonlinear states using external pulses.
• Achieved manipulation of angular scanning sectors and scattering patterns.
• Potential for controllable multistate optical switching and coding.

Conclusions:

• The proposed asymmetric nonlinear nanoantenna offers enhanced functionality and control.
• This design represents a significant step towards tunable applications in nonlinear nanophotonics and biophotonics.
• The system's multistability and dynamic behaviors open avenues for advanced optical information processing.