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arxiv: 1009.1582 · v1 · pith:XGBAWN2Dnew · submitted 2010-09-08 · ⚛️ physics.plasm-ph

Dynamics of Nanometer-Scale Foil Targets Irradiated with Relativistically Intense Laser Pulses

R. H\"orlein (1 , 2) , S. Steinke (3) , A. Henig (1 , S. G. Rykovanov (1 , M. Schn\"urer (3) , T. Sokollik (3) , D. Kiefer (1
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D. Jung (2 4) X. Q. Yan (2 5) J. M. Michailova (1) T. Tajima (2 6) J. Schreiber (1 M. Hegelich (2 qnd 4) P. V. Nickles (3 7) M. Zepf (1 8) G. D. Tsakiris (1) W. Sandner (3) D. Habs (1 2) ((1) Max-Planck-Institut f\"ur Quantenoptik Garching Germany (2) Fakult\"at f\"ur Physik Ludwig-Maximilians-Universit\"at M\"unchen (3) Max-Born-Institut Berlin (4) Los Alamos National Laboratory Los Alamos NM USA (5) State Key Lab of Nuclear Physics Technology Peking University Bejing China (6) Photomedical Research Center JAEA Kyoto Japan (7) Gwangju Institute of Science GIST Gwangju Republic of Korea (8) Department of Physics Astronomy Queens University Belfast Belfast United Kingdom)
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classification ⚛️ physics.plasm-ph
keywords experimentalfoilgeneratedharmonicharmonicsirradiatedlasernanometer-scale
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In this letter we report on an experimental study of high harmonic radiation generated in nanometer-scale foil targets irradiated under normal incidence. The experiments constitute the first unambiguous observation of odd-numbered relativistic harmonics generated by the $\vec{v}\times\vec{B}$ component of the Lorentz force verifying a long predicted property of solid target harmonics. Simultaneously the observed harmonic spectra allow in-situ extraction of the target density in an experimental scenario which is of utmost interest for applications such as ion acceleration by the radiation pressure of an ultraintense laser.

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