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Magnetoplasmonic Nanoantennas for On-Chip Reconfigurable Optical Wireless Communications.
Gabriel H B Damasceno1, William O F Carvalho1, Arismar Cerqueira Sodré1
1National Institute of Telecommunications (Inatel), Santa Rita do Sapucaí37540-000, MG, Brazil.
ACS Applied Materials & Interfaces
|January 23, 2023
Summary
This study presents a novel concept for tunable optical nanoantennas using magnetic fields for beam steering. This enables reconfigurable on-chip wireless communications with enhanced integration capabilities.
Area of Science:
- Photonics and Nanotechnology
- Magneto-optics
- Electromagnetics
Background:
- On-chip wireless communication demands optical nanoantennas with tunable radiation patterns for higher integration.
- Existing approaches often rely on fixed nanoantenna configurations, limiting dynamic control.
Purpose of the Study:
- To introduce a concept for active manipulation of radiated beam steering in optical nanoantennas using applied magnetic fields.
- To demonstrate magnetically controlled beam steering for reconfigurable optical wireless communications.
Main Methods:
- Utilizing a Yagi-Uda-like arrangement of magnetoplasmonic nanoribs (Co6Ag94 in SiO2).
- Employing full-wave electromagnetic simulations with the finite element method for numerical demonstration.
- Investigating the effect of magnetization direction on beam steering.
Main Results:
- Demonstrated numerical tilting of the radiated beam from the nanoantenna plane.
- Showcased that reversing magnetization changes beam tilt direction.
- Confirmed recovery of conventional plasmonic nanoantenna patterns upon demagnetization.
Conclusions:
- The proposed magnetoplasmonic nanoantenna system enables magnetically controlled, reconfigurable optical wireless communications.
- The design is based on experimentally viable materials and fabrication methods (nanolithography).
- The concept is adaptable for optical or infrared wavelengths, with a proof of concept at 700 nm.
