Oxford Centre for High Energy Density Science (OxCHEDS)

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Opportunities and challenges using short-pulse x-ray sources

Journal of Physics Conference Series IOP Publishing 21:1 (2005) 87

Authors:

J Larsson, O Synnergren, TN Hansen, K Sokolowski-Tinten, S Werin, C Caleman, J Hajdu, J Shepherd, JS Wark, AM Lindenberg, KJ Gaffney, JB Hastings
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Optically Induced Lattice Dynamics Probed with Ultrafast X-ray Diffraction

Institute of Electrical and Electronics Engineers (IEEE) 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
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Optically induced lattice dynamics probed with ultrafast X-ray diffraction

Optics InfoBase Conference Papers (2005)

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 LuMnO3 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 LuMnO3. © 2003 Optical Society of America.

Radiative Rates, Collision Strengths and Effective Collision Strengths for Transitions in Gd XXXVII

Physica Scripta IOP Publishing 71:4 (2005) 356-361

Authors:

KM Aggarwal, FP Keenan, R Kisielius, PH Norrington, RE King, GJ Pert, SJ Rose
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Simulations of the phonon Bragg switch in GaAs

Solid State Communications 136:3 (2005) 181-185

Authors:

JMH Sheppard, P Sondhauss, R Merlin, P Bucksbaum, RW Lee, JS Wark

Abstract:

It has recently been proposed that X-rays can be switched on sub-picosecond time-scales by using laser-generated coherent optical phonons: The so called phonon Bragg switch. We present here detailed simulations of the efficiency of such a switch by solving the time-dependent generalized Takagi-Taupin equations utilizing a perturbative approach. We explore the switching efficiency in diffraction from the (004) planes of GaAs as a function of both excited phonon wave vector and amplitude. © 2005 Elsevier Ltd. All rights reserved.
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