S. I. Ashitkov, M. B. Agranat, P. S. Kondratenko, S. I. Anisimov, V. E. Fortov, V. V. Temnov, K. Sokolowski-Tinten, B. Rethfeld, P. Zhou, D. von der Linde, “Ultrafast laser-induced phase transitions in tellurium”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2002, Volume 76, Issue 7,Pages <nobr>538

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CONDENSED MATTER

Ultrafast laser-induced phase transitions in tellurium

S. I. Ashitkov^a, M. B. Agranat^a, P. S. Kondratenko^a, S. I. Anisimov^a, V. E. Fortov^a, V. V. Temnov^bc, K. Sokolowski-Tinten^c, B. Rethfeld^c, P. Zhou^c, D. von der Linde^c

^a Institute of High Energy Density, Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow
^b Institute of Applied Physics, Russian Academy of Sciences, Nizhnii Novgorod
^c Institute for Laser and Plasma Physics, University of Essen

Abstract: We present experimental investigations of ultrafast phase transitions in tellurium following excitation with an intense femtosecond laser pulse. Femtosecond time-resolved polarization-sensitive microscopy is used to monitor the temporal evolution of the optical anisotropy (birefringence) of the irradiated material. The decay of the optical anisotropy associated with the loss of order in crystalline tellurium is fluence dependent and occurs within 0.5-3 ps.

PACS: 63.90.+t, 78.90.+t

Received: 02.09.2002

Language: English