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Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
Published on: May 23, 2018
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Vanadium dioxide-assisted switchable multifunctional metamaterial structure
Optics Express
|October 14, 2022
Summary
This study introduces a vanadium dioxide (VO2) metamaterial that acts as a switchable device. It achieves broadband absorption, polarization conversion, and reflection, enabling versatile terahertz applications.
Area of Science:
- Metamaterials
- Terahertz (THz) technology
- Condensed matter physics
Background:
- Metamaterials offer unique electromagnetic properties.
- Vanadium dioxide (VO2) exhibits a thermally tunable insulator-to-metal transition (IMT).
- Controlling THz wave polarization and absorption is crucial for advanced applications.
Purpose of the Study:
- To propose a multifunctional design based on VO2 metamaterial.
- To achieve switchable broadband absorption, linear-to-linear (LTL) and linear-to-circular (LTC) polarization conversion, and total reflection.
- To investigate the impact of geometric parameters and incident angles.
Main Methods:
- Design and simulation of a VO2-based metamaterial structure.
- Analysis of electromagnetic response across different frequency bands.
- Investigation of the insulator-to-metal transition (IMT) of VO2.
Main Results:
- Achieved broadband absorption (>90%) from 2.17-4.94 THz in the metallic state.
- Demonstrated LTC polarization conversion (0.1-3.5 THz) and LTL polarization conversion (>90% from 3.755-4.856 THz) in the insulator state.
- Confirmed total reflection for 0° polarized incident waves.
Conclusions:
- The proposed VO2 metamaterial exhibits switchable multifunctional characteristics.
- The design is promising for advanced THz research and smart applications.
- Tunable THz wave manipulation is achieved through VO2's IMT.
