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Conferences > ICUSD > 2012 > IT4D > IT4D.3

Time-resolved THz spectroscopy of the ultrafast photoinduced insulator-metal phase transition of VO2

T. L. Cocker, L. V. Titova, S. Fourmaux, G. Holloway, H.-C. Bandulet, D. Brassard, J.-C. Kieffer, M. A. El Khakani, and F. A. Hegmann

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Abstract

Time-resolved THz spectroscopy is used to probe the photoinduced insulator-metal phase transition of VO2 at low temperatures. A phase diagram of threshold pump fluence versus temperature shows that critical electron and structural transition phonon densities are required for the transition to occur. Evidence for an intermediate, Mott-melted, metallic state is also observed.

© 2012 Optical Society of America

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