Ultrafast Dynamics of the VO2 Insulator-to-Metal Transition Observed by Nondegenerate Pump-Probe Spectroscopy

Authors :: Haglund R. F.
Prasankumar R. P.
Nag J.
Seo M.
Appavoo K.
Brady N. F.
Hilton D. J.
Source :: EPJ Web of Conferences, Vol 41, p 03006 (2013)
Publication Year :: 2013
Publisher :: EDP Sciences, 2013.
Abstract: Non-degenerate pump (1.5 eV)-probe (0.4 eV) transmission spectroscopy on vanadium dioxide films grown on glass and three different sapphire substrates shows systematic variations with substrate that correlate with VO2 grain size and laser fluence. Temperature dependent measurements showed changes in the electronic response that is proportional to the metallic fraction.

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