# Terahertz magnetic response of plasmonic metasurface resonators: origin and orientation dependence

## TL;DR

This paper explains how a plasmonic metasurface enhances terahertz magnetic responses in 2D materials and how orientation affects this enhancement.

## Contribution

The study provides detailed semi-analytical models explaining the magnetic resonance and orientation dependence in plasmonic metasurface resonators.

## Key findings

- The resonance behavior of plasmonic metasurfaces is explained using a semi-analytical model.
- Orientation affects the magnetic response due to antenna anisotropy and experimental setup.
- The findings help improve magnetic spectroscopy for 2D materials.

## Abstract

The increasing miniaturization of everyday devices necessitates advancements in surface-sensitive techniques to access phenomena more effectively. Magnetic resonance methods, such as nuclear or electron paramagnetic resonance, play a crucial role due to their unique analytical capabilities. Recently, the development of a novel plasmonic metasurface resonator aimed at boosting the THz electron magnetic response in 2D materials resulted in a significant magnetic field enhancement, confirmed by both numerical simulations and experimental data. Yet, the mechanisms driving this resonance were not explored in detail. In this study, we elucidate these mechanisms using two semi-analytical models: one addressing the resonant behaviour and the other examining the orientation-dependent response, considering the anisotropy of the antennas and experimental framework. Our findings contribute to advancing magnetic spectroscopic techniques, broadening their applicability to 2D systems.