Vanadium dioxide-based tunable broadband metamaterial absorber in the terahertz
Year: 2024
Type: article
Abstract: This study presents a three-layer broadband absorber comprising a vanadium dioxide (VO2) layer at the top, a polytetrafluoroethylene layer in the middle, and a gold film at the bottom. Absorption curves were calculated using the multiple-reflection principle and impedance matching theory, and the obtained results were consistent with the simulation results. According to simulation results, within the range of controllable conductivity of VO2, the absorption rate of the as-developed structure varied from 1.5% to 99.8%, with the bandwidth extending from 0 THz to 5.19 THz. The metamaterial maintained > 75% absorption across the frequency band for incident angles up to 45°, with the absorption rate varying for different polarization angles. The as-developed metamaterial exhibited the characteristics of wide-angle incidence and polarization sensitivity and has excellent application prospects in the domains of medicine, military, and communication.
Source: Materials Research Express
Author: Yuqi Zhu
Institution: Tianjin University
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,880
OpenAlex ID: W4405899188