Magnetoplasmonic Quasicrystals

TL;DR

This paper introduces a novel magnetoplasmonic quasicrystal structure with a wideband magneto-optical response, enabling advanced light control and sensing applications through multiple plasmon resonances.

Contribution

It presents the design and analysis of a new magnetoplasmonic quasicrystal with controllable broadband TMOKE, expanding the functionality of nanophotonic devices.

Findings

Demonstrated broadband TMOKE in the quasicrystal structure

Achieved controllable multiple plasmon-related resonances

Showed potential for enhanced optical sensing and light control

Abstract

Nanostructured magneto-optical materials sustaining optical resonances open very efficient way for light control via magnetic field, which is of prime importance for telecommunication and sensing applications. However, usually their response is narrowband due to its resonance character. Here we demonstrate and investigate a novel type of the magnetoplasmonic structure, the magnetoplasmonic quasicrystal, which demonstrates unique magneto-optical response. It consists of the magnetic dielectric film covered by a thin gold layer perforated by slits forming a Fibonacci-like binary sequence. The transverse magneto-optical Kerr effect (TMOKE) acquires controllable multiple plasmon-related resonances resulting in a magneto-optical response in a wide frequency range. The broadband TMOKE is valuable for numerous nanophotonics applications including optical sensing, control of light, all-optical control of magnetization etc. On the other hand, TMOKE spectroscopy is an efficient tool for investigation of the peculiarities of plasmonic quasicrystals.