Title :
Ultrafast metal-insulator transition in VO2 driven by electron injection
Author :
Appavoo, Kannatassen ; Brady, Nathaniel F. ; Seo, Minah ; Nag, Joyeeta ; Prasankumar, Rohit P. ; Hilton, David J. ; Haglund, Richard F., Jr.
Author_Institution :
Interdiscipl. Mater. Sci. & Inst. for Nanoscale Sci. & Eng., Vanderbilt Univ., Nashville, TN, USA
Abstract :
A novel all-optical method of triggering phase-transition in prototypical vanadium dioxide using the “hot-electron” effect is demonstrated. Structural and electronic switching times are retrieved by nondegenerate pump-probe transmission spectroscopy on the hybrid metallic/phase-changing nanomaterial.
Keywords :
gold; high-speed optical techniques; hot carriers; infrared spectra; metal-insulator transition; nanostructured materials; phase change materials; solid-state phase transformations; vanadium compounds; visible spectra; Au-VO2; all-optical method; electron injection; electronic switching times; hot-electron effect; hybrid metallic-phase change nanomaterials; nondegenerate pump-probe transmission spectroscopy; structural switching times; triggering phase-transition; ultrafast metal-insulator transition; Gold; Optical films; Optical pulses; Optical pumping; Optical switches; Ultrafast optics;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2012 Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4673-1839-6
