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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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Multifunctional terahertz metamaterial based on vanadium dioxide and silicon
Applied Optics
|May 3, 2023
Summary
This study introduces a novel metamaterial device that switches functions in the terahertz (THz) band using vanadium dioxide and silicon. It enables versatile polarization control and broadband absorption for advanced THz applications.
Area of Science:
- Metamaterials
- Terahertz (THz) Technology
- Optoelectronics
Background:
- Metamaterials offer unique electromagnetic properties.
- Terahertz (THz) technology requires versatile devices for applications.
- Vanadium dioxide (VO2) and silicon exhibit tunable properties.
Purpose of the Study:
- To propose a multifunctional metamaterial device for the THz band.
- To demonstrate tunable polarization conversion and absorption.
- To integrate VO2 phase transition and silicon photoconductivity.
Main Methods:
- Fabrication of a metamaterial device with VO2 and silicon.
- Utilizing VO2 phase transition from insulating to metal-like states.
- Exploiting silicon's photoconductive effect under varying light intensities.
Main Results:
- Side I: Linear to linear polarization conversion (0.408-0.970 THz) in insulating VO2.
- Side I: Linear to circular polarization conversion (0.469-1.127 THz) in metallic VO2.
- Side II: Linear to linear polarization conversion (0.799-1.336 THz) without light.
- Side II: Stable broadband absorption (0.697-1.483 THz) with increasing light intensity.
Conclusions:
- The proposed device achieves multifunctional operation in the THz band.
- It offers tunable polarization control and broadband absorption.
- Provides a novel design concept for multifunctional metamaterials.
