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Proceedings Paper

Variation of optical properties of gel-derived VO2 thin films with temperature
Author(s): Lisong Hou; Song W. Lu; Fuxi Gan
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Paper Abstract

VO2 thin films are prepared on three kinds of substrates by the sol-gel dip-coating method followed by heat treatment under vacuum conditions. The IR and UV-visible spectra of the films are studied during heating and cooling between room temperature and 100 degree(s)C. The experimental results show that the films exhibit thermally-induced reversible phase transition and, as a result, the maximum changes in transmittance and reflectivity are 58% and 25%, respectively, in the case of vacuum heat treatment at 400 degree(s)C and silica glass substrates. The refractive index n decreases and the extinction coefficient k increases when heating these films from room temperature to 100 degree(s)C, and vice versa. The reasons why the optical constants and IR absorption spectra change so remarkably are discussed.

Paper Details

Date Published: 1 November 1991
PDF: 9 pages
Proc. SPIE 1519, International Conference on Thin Film Physics and Applications, (1 November 1991); doi: 10.1117/12.47194
Show Author Affiliations
Lisong Hou, Shanghai Institute of Optics and Fine Mechanics (China)
Song W. Lu, Shanghai Institute of Optics and Fine Mechanics (China)
Fuxi Gan, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 1519:
International Conference on Thin Film Physics and Applications

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