Double tunable metamaterial perfect absorber

TL;DR

This paper presents a simulation of a tunable infrared metamaterial absorber that can be adjusted via temperature-induced conductivity changes in VO2 and electric field-induced shape modifications, enabling dynamic control of absorption spectra.

Contribution

It introduces a double tuning mechanism for a metamaterial absorber using VO2's thermochromic properties and PZT's piezoelectric effects, which is novel in infrared applications.

Findings

Conductivity of VO2 can be tuned from 200 S/m to 2*10^5 S/m.

Absorption peak intensity can be continuously adjusted through temperature control.

Shape of the absorber can be precisely controlled by electric field application.

Abstract

This paper focuses on the simulation of a tunable metamaterial absorber designed for the infrared region. Adsorbents offer three different mechanisms to adjust their absorption characteristics. The first method involves changes in temperature. When the temperature changes, the electrical conductivity of the active material, vanadium dioxide (VO2), also changes. This transition between insulating and conducting phases at different temperatures provides the possibility to adjust the absorption spectrum of the metamaterial. By exploiting the thermochromic properties of VO2, the conductivity of the material can be dynamically adjusted over a wide range. Through temperature control, the conductivity of VO2 changes from 200 S/m to 2*105 S/m, resulting in a continuous adjustment of the absorption peak intensity. The second method relies on applying an electric field. By applying an electric field in the transverse direction of the lead zirconate titanate )PZT( material, the size of the piezoelectric material undergoes changes and bending. Consequently, the entire structure bends, leading to a change in the shape of the absorber. This mechanism allows for precise control of the absorber's shape by applying different voltages, which in turn enables the modification of the absorption peak.