Femtosecond switching of the solid state phase transition in the smart-system material VO2

Michael F. Becker; A. Bruce Buckman; Rodger M. Walser; Thierry Lepine; Patrick M. Georges; Alain Brun

doi:10.1117/12.174076

1 May 1994 Femtosecond switching of the solid state phase transition in the smart-system material VO₂

Michael F. Becker, A. Bruce Buckman, Rodger M. Walser, Thierry Lepine, Patrick M. Georges, Alain Brun

Proceedings Volume 2189, Smart Structures and Materials 1994: Smart Materials; (1994) https://doi.org/10.1117/12.174076
Event: 1994 North American Conference on Smart Structures and Materials, 1994, Orlando, FL, United States

Abstract

We have measured the optical response speed of the semiconductor to metal phase transition in VO₂ films for excitation with femtosecond laser pulses at 780 nm wavelength. By probing at a wavelength of 780 nm on a time scale from 0 to 0.5 ns and at 633 nm for longer times, we have determined the dynamic response of the complex refractive index and the complex permittivity as determined from transmission and reflection measurements. The phase transition was found to be largely prompt with the final high-temperature metallic state reached in less than 5 ps.

Citation Download Citation

Michael F. Becker, A. Bruce Buckman, Rodger M. Walser, Thierry Lepine, Patrick M. Georges, and Alain Brun "Femtosecond switching of the solid state phase transition in the smart-system material VO₂", Proc. SPIE 2189, Smart Structures and Materials 1994: Smart Materials, (1 May 1994); https://doi.org/10.1117/12.174076

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