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Vanadium Dioxide Thin Films for Thermo-Optical Switching Applications

Published online by Cambridge University Press:  01 February 2011

Lijun Jiang  and
William N. Carr
Lijun Jiang
Affiliation:
New Jersey Institute of Technology Newark, NJ 07102, USA
William N. Carr
Affiliation:
New Jersey Institute of Technology Newark, NJ 07102, USA
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Abstract

Vanadium dioxide (VO2) thin films were fabricated by e-beam evaporation of vanadium thin films followed by thermal oxidation in oxygen ambient. The properties of the VO2 films were investigated for thermo-optical switching applications. Synthesized VO2 film displays a phase transition at 65 – 68 °C. It exhibits an abrupt change in optical reflectivity over the phase transition temperature range. Results for VO2 on a highly reflective metal layer are strongly dependent on the VO2 thickness. The optical switching has a major hysteresis of about 15 °C between the heating and cooling branches. The evolution of the surface morphology with the oxidation time was studied with a SEM. The VO2 film was patterned on microplatforms by metal lift-off technique. We conclude that the evaporation followed by oxidation is an effective method to produce active VO2 film for thermo-optical switching devices.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 785: Symposium D – Materials and Devices for Smart Systems , 2003 , D10.4
Copyright
Copyright © Materials Research Society 2004

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References

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