Title :
Multi-THz conductivity and lattice dynamics during a femtosecond insulator-metal transition in VO2
Author :
Lopez, Rene ; Halabica, Andrej ; Haglund, Richard F., Jr. ; Kuebler, Carl ; Ehrke, Henri ; Huber, Rupert ; Leitenstorfer, Alfred
Abstract :
Ultrabroadband THz spectroscopy directly monitors the femtosecond onset of conductivity during the photoinduced insulator-to-metal phase transition in vanadium dioxide. We observe coherent structural distortions via anharmonic phonon coupling and fluence-dependent self-trapping of excitons.
Keywords :
Conductivity; Insulation; Lattices; Optical distortion; Optical pulse generation; Physics; Pulse amplifiers; Spectroscopy; Ultrafast electronics; Ultrafast optics;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 2007. QELS '07
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
978-1-55752-834-6
DOI :
10.1109/QELS.2007.4431808
