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

Publisher Website
Google Scholar
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.

This publication has 0 references indexed in Scilit: