Professor Justin Wark: Publications

Radiation transfer effects on the spectra of laser-generated plasmas

PHYSICAL REVIEW LETTERS 96:18 (2006) ARTN 185002

Authors:

O Renner, FM Kerr, E Wolfrum, J Hawreliak, D Chambers, SJ Rose, JS Wark, HA Scott, P Patel

Shock deformation of face-centred-cubic metals on subnanosecond timescales

NATURE MATERIALS 5:10 (2006) 805-809

Authors:

M Bringa, K Rosolankova, RE Rudd, BA Remington, JS Wark, M Duchaineau, H Kalantar, J Hawreliak, J Belak

Simulations of time-resolved x-ray diffraction in Laue geometry

JOURNAL OF PHYSICS-CONDENSED MATTER 18:40 (2006) 9231-9244

Authors:

B Lings, JS Wark, MF DeCamp, DA Reis, S Fahy

Optically induced lattice dynamics probed with ultrafast x-ray diffraction

Quantum Electronics and Laser Science Conference QELS 2 (2005) 748-750

Authors:

HJ Lee, JB Workman, RD Averitt, AJ Taylor, JP Roberts, Q McCulloch, DE Hof, DJ Funk, JS Wark, N Hur, SW Cheong

Abstract:

We have studied the picosecond-dynamics of optically pumped hexagonal LuMnO 3 using ultrafast x-ray diffraction. Experimental data are compared with a simulation based on dynamical diffraction theory modified to account for the hexagonal structure of LuMnO 3. © 2003 Optical Society of America.

Observation of structural anisotropy and the onset of liquidlike motion during the nonthermal melting of InSb

Physical Review Letters 95:12 (2005)

Authors:

KJ Gaffney, AM Lindenberg, J Larsson, K Sokolowski-Tinten, C Blome, O Synnergren, J Sheppard, C Caleman, AG MacPhee, D Weinstein, DP Lowney, T Allison, T Matthews, RW Falcone, AL Cavalieri, DM Fritz, SH Lee, PH Bucksbaum, DA Reis, J Rudati, AT MacRander, PH Fuoss, CC Kao, DP Siddons, R Pahl, K Moffat, J Als-Nielsen, S Duesterer, R Ischebeck, H Schlarb, H Schulte-Schrepping, J Schneider, D Von Der Linde, O Hignette, F Sette, HN Chapman, RW Lee, TN Hansen, JS Wark, M Bergh, G Huldt, D Van Der Spoel, N Timneanu, J Hajdu, RA Akre, E Bong, P Krejcik, J Arthur, S Brennan, K Luening, JB Hastings

Abstract:

The melting dynamics of laser excited InSb have been studied with femtosecond x-ray diffraction. These measurements observe the delayed onset of diffusive atomic motion, signaling the appearance of liquidlike dynamics. They also demonstrate that the root-mean-squared displacement in the [111] direction increases faster than in the [110] direction after the first 500 fs. This structural anisotropy indicates that the initially generated fluid differs significantly from the equilibrium liquid. © 2005 The American Physical Society.

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