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Photoinduced Solid Phase Transformation in Vanadium Dioxide Films

Published online by Cambridge University Press:  26 February 2011

Sergiy Lysenko ,
Valentin Vikhnin ,
Armando Rua ,
Felix Fernandez  and
Huimin Liu
Sergiy Lysenko
Affiliation:
SLysenko@feynman.uprm.edu, University of Puerto Rico, Department of Physics, University of Puerto Rico, Mayaguez, Puerto Rico, 00681-9016, United States Minor Outlying Islands
Valentin Vikhnin
Affiliation:
vikhnin@uni-osnabrueck.de, University of Puerto Rico, Department of Physics, Puerto Rico
Armando Rua
Affiliation:
f_fernandez@feynman.uprm.edu, University of Puerto Rico, Department of Physics, Puerto Rico
Felix Fernandez
Affiliation:
f_fernandez@feynman.uprm.edu, University of Puerto Rico, Department of Physics, Puerto Rico
Huimin Liu
Affiliation:
hliu@uprm.edu, University of Puerto Rico, Department of Physics, Puerto Rico
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Abstract

Laser induced insulator-to-metal phase transition in VO2 thin films was explored using femtosecond optical pump-probe spectroscopy. The transient reflection and relaxation processes in VO2 were observed during phase transition on 10-11 - 10-9 temporal-scale. Optical generation of carriers in VO2 initiates extremely fast changes in reflectivity which is strongly dependent on pump fluence. Analysis of transient optical properties allows suggesting the excitonic-controlled mechanism responsible for the light-induced phase transition in VO2.

Keywords

metal-insulator transitionoxideoptical properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 905: Symposium DD – Materials for Transparent Electronics , 2005 , 0905-DD05-12
Copyright
Copyright © Materials Research Society 2006

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