Polarization management based on dipolar interferences and lattice couplings.

Area of Science:

• * Photonics and Metamaterials
• * Nanophotonics
• * Optical Engineering

Background:

• * Controlling light polarization is crucial for many optical technologies.
• * Metalattices offer unique optical properties due to their subwavelength structures.
• * Previous methods for polarization manipulation often face limitations in efficiency and tunability.

Purpose of the Study:

• * To achieve efficient polarization manipulations in one-dimensional cylindrical metalattices.
• * To design and demonstrate a high-performance linear polarizer based on these metalattices.
• * To investigate the role of dipolar interferences and lattice couplings in polarization control.

Main Methods:

• * Utilized the scattering asymmetry factor (g) to quantify directional scattering.
• * Employed silicon (c-Si) nanostructures to excite electric and magnetic dipoles.
• * Designed a metalattice with optimized particle arrangement considering lattice effects.

Main Results:

• * Achieved maximum scattering asymmetry factor |g|max=1/2 with simultaneous electric and magnetic dipole excitations.
• * Demonstrated a metalattice polarizer with near-perfect reflection for p-polarized waves and zero reflection for s-polarized waves.
• * Obtained high extinction ratios for transmission (17 dB) and reflection (24 dB), attributed to lattice couplings and dipolar interferences.

Conclusions:

• * The proposed metalattice enables efficient and robust linear polarization control.
• * Lattice effects significantly tune polarization-dependent scattering and far-field patterns.
• * The study provides a pathway for advanced optical devices leveraging multipolar interference and lattice coupling.