Andrea Cavalleri: Publications

Time resolved conductivity dynamics in vanadium dioxide

Optics InfoBase Conference Papers (2006)

Authors:

DJ Hilton, RP Prasankumar, S Fourmaux, A Cavalleri, D Brassard, MA El Khakani, JC Kieffer, AJ Taylor, RD Averitt

Abstract:

Optical-pump terahertz-probe spectroscopy is used to investigate the photoinduced insulator-to-metal phase transition in vanadium dioxide. The observed dynamics are consistent with a spatially inhomogeneous insulating state. © 2005 Optical Society of America.

Ultra-broadband femtosecond measurements of the photo-induced phase transition in VO2: From the mid-IR to the hard X-rays

Journal of the Physical Society of Japan 75:1 (2006)

Authors:

A Cavalleri, M Rini, RW Schoenlein

Abstract:

We review our work on the photo-induced insulator-metal transition in the strongly-correlated, spin-Peierls compound VO2. Our pump-probe experiments exploit the full spectral range of modern femtosecond science, combining time-resolved mid-IR and visible techniques with ultrafast soft x-ray absorption and hard x-ray diffraction. We also report on the switching behavior of VO2 nanoparticles embedded in Silica or in optical fibers, a new route to incorporate complex, photo-active materials into technologically viable environments. ©2006 The Physical Society of Japan.

Ultrafast gigantic photo-response in (EDO-TTF)2PF6 initiated by 10-fs laser pulses

Optics InfoBase Conference Papers (2006)

Authors:

J Itatani, M Rini, A Cavalleri, K Onda, T Ishikawa, SY Koshihara, X Shao, H Yamochi, G Saito, RW Shoenlein

Abstract:

We photoexited a charge-ordered organic salt (EDO-TTF)2PF6 with sub-10-fs optical pulses. The photo-induced metallic phase appeared within 50-fs after pumping, characterized by large changes in reflectivity (ΔR/R~0.8) followed by strong coherent phonon modulation. © 2006 Optical Society of America.

Enhanced photosusceptibility in the insulator-to-metal phase transition in vanadium dioxide

Optica Publishing Group (2006) mg6

Authors:

DJ Hilton, RP Prasankumar, S Fourmaux, A Cavalleri, D Brassard, MA El Khakani, JC Keiffer, AJ Taylor, RD Averitt

Lattice Motions from THz Phonon-polaritons measured with Femtosecond X-ray Diffraction.

Optica Publishing Group (2006) wb4

Authors:

A Cavalleri, S Wall, M Rini, C Simpson, N Dean, M Khalil, E Statz, DW Ward, KA Nelson, RW Schoenlein

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