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Updated: Sep 21, 2025
11:10
Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
Published on: May 23, 2018
12.1K
Infrared Transmission Characteristics of Phase Transitioning VO2 on Various Substrates
Samee Azad1, Durga Gajula2, Nawraj Sapkota3
1Holcombe Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634, USA.
Micromachines
|May 28, 2022
Summary
Vanadium dioxide (VO2) thin films exhibit significant infrared light modulation. These VO2 films show over 80% transmissivity change, enabling fast optical switching for infrared applications.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Optoelectronics
Background:
- Vanadium dioxide (VO2) is a material known for its thermochromic properties.
- Its phase transition near room temperature affects electrical and optical characteristics.
- Understanding these properties is crucial for developing advanced optical devices.
Purpose of the Study:
- To characterize the infrared transmission of VO2 thin films.
- To investigate the influence of substrate type and mechanical strain on VO2 phase transitions.
- To explore the potential of VO2 for optical modulation applications.
Main Methods:
- Synthesis of VO2 thin films using low-pressure direct oxidation.
- Characterization of material quality and optical properties using infrared (IR) spectroscopy.
- Investigation of phase transition dynamics under pulsed laser illumination.
- Analysis of the effect of mechanical strain on VO2 films grown on flexible substrates.
Main Results:
- High-quality VO2 thin films were synthesized on various substrates.
- An optical transmissivity change exceeding 80% was observed at 1550 nm IR illumination.
- Pulsed laser excitation induced rapid phase transitions, modulating IR transmission with a low time constant.
- Mechanical strain significantly shifted the phase transition temperature in VO2 on flexible muscovite.
Conclusions:
- VO2 thin films demonstrate excellent potential for IR optical switching and modulation.
- The observed properties are highly dependent on material quality and substrate interactions.
- Strain engineering offers a viable method to tune the phase transition temperature of VO2.
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