Journal
OPTICS COMMUNICATIONS
Volume 285, Issue 6, Pages 1190-1193Publisher
ELSEVIER
DOI: 10.1016/j.optcom.2011.09.057
Keywords
Vanadium dioxide; Phase transition; Refractive index modulation; Infrared; Optical limiting; Femtosecond regime
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Funding
- Abdus Salam ICTP-Trieste
- Nanosciences African Network NANOAFNET'-Cape Town
- iThemba LABS-National Research Foundation of South Africa
- African Laser Centre ALC-Pretoria
- French-South Africa cooperation programs
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Being a Mott type oxide, at a temperature of similar to 68 degrees C and ambient pressure, stoichiometric VO2 undergoes a first order metal-insulator transition, which is accompanied by a reversible abrupt change in the band gap opening. From an optical point of view, this metal-insulator transition manifests itself by a significant and reversible variation of the refractive index under either a thermal stimuli or by photo-induction. This contribution reports on the ultrafast optical limiting in the IR regime of pulse laser deposited VO2 nanostructures. (C) 2011 Elsevier B.V. All rights reserved.
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