Enhanced energy coupling by using structured nano-wire targets
1 Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, Japan
2 CEA, DAM, DIF, 91297 Arpajon, France
3 Center for Ultrafast Optical Science, Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
a e-mail: email@example.com
b Current institution: Univ. Hyogo, Japan
Published online: 15 November 2013
We have investigated the interaction of ultra intense laser light with a carbon nanotube (CNT) target. The experimental results show an increased electron acceleration and a very low laser reflection as compared to non-structured targets. In addition, interferograms show very weak plasma expansion in front of the CNT target whereas the flat target creates a considerable amount of preformed plasma. A 2-D PIC calculation indicates that high laser absorption is possible via a Brunel mechanism following the ponderomotive heating in the expanded plasma between nanotubes.
© Owned by the authors, published by EDP Sciences, 2013
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