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21 October 2019 Ultrafast laser-matter interaction with nanostructured targets
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Abstract
Conventional solid-density laser-plasma targets quickly ionize to make a plasma mirror, which largely reflects ultra-intense laser pulses. This Fresnel reflection at the plane boundary largely wastes our e orts at ultra-intense laser/solid interaction, and limits target heating to nonlinear generation of high-energy electrons which penetrate inward. One way around this dual problem is to create a material with an anisotropic dielectric function, for instance by nanostructuring a material in such a way that it cannot support the material responses which generate a specularly reflected beam. We present linear theory for metallic and plasma nanowires, particle-incell simulations of the interaction of ultra-intense femtosecond pulses with nickel nanowires, showing penetration of laser light far deeper than a nickel skin-depth, helping to uniformly heat near-solid material to conditions of high energy-densities, and XFEL experiments giving insight into their ionization and excitation.
© (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Robin S. Marjoribanks, L. Lecherbourg, J. E. Sipe, G. Kulcsàr , A. Héron, J.-C. Adam, A. Miscampbell, G. Thomas, R. Royle, O. Humphries, R. H. H. Ko, S. Le Moal, A. Tan, J. Li, T. R. Preston, Q. van den Berg, M. Kasim, B. Nagler, E. C. Galtier, E. Cunningham, J. S. Wark, and S. Vinko "Ultrafast laser-matter interaction with nanostructured targets", Proc. SPIE 11111, X-Ray Lasers and Coherent X-Ray Sources: Development and Applications XIII, 111110L (21 October 2019); https://doi.org/10.1117/12.2533528
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