Tunable Metamaterial Absorber Based on Archimedean Spiral-Shaped Structure

TL;DR

This paper demonstrates a tunable broadband metamaterial absorber operating from 60 to 600 THz, utilizing an Archimedean spiral structure and temperature-controlled conductivity changes in vanadium dioxide for adjustable absorption.

Contribution

It introduces a novel design of a tunable metamaterial absorber with an Archimedean spiral structure controlled by temperature-induced conductivity variations.

Findings

Achieves broadband absorption from 60 to 600 THz.

Demonstrates tunability via temperature changes in vanadium dioxide.

Provides design insights for optimized tunable metamaterials.

Abstract

In recent times, the Archimedean spiral structure has been considered as a promising design element in construction for specific purposes and opening up new possibilities in various applications. Its distinctive geometry exhibits a continuous growth pattern with a constant separation between its successive turns. One notable application of the Archimedean spiral structure in metamaterial absorbers is in achieving broadband absorption. This paper presents a comprehensive simulation of a tunable metamaterial absorber with an Archimedean spiral structure in the frequency range of 60 to 600 terahertz. The absorber's absorption spectrum is controlled by temperature variations that induce changes in the conductivity of vanadium dioxide. The absorber is composed of three layers: a bottom layer made of gold, a middle layer consisting of vanadium dioxide, and an upper layer is constructed using a gold cylinder, from which the Archimedean spiral with the same thickness as the gold is subtracted. This research provides valuable insights into the design and optimization of tunable metamaterial absorber.