Absorption of Ultrashort Laser Pulses in Strongly Overdense Targets

Journal Article · Fri Jun 20 04:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.245001· OSTI ID:21134053

Cerchez, M; Jung, R; Osterholz, J; Toncian, T; Willi, O; Mulser, P; Ruhl, H ^[1]

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1. Heinrich-Heine Universitaet Duesseldorf, Universitaetsstr.1, 40225 Duesseldorf (Germany)

Absorption measurements on solid conducting targets have been performed in s and p polarization with ultrashort, high-contrast Ti:sapphire laser pulses at intensities up to 5x10{sup 16}W/cm{sup 2} and pulse duration of 8 fs. The particular relevance of the reported absorption measurements lies in the fact that the extremely short laser pulse interacts with matter close to solid density during the entire pulse duration. A pronounced increase of absorption for p polarization at increasing angles is observed reaching 77% for an incidence angle of 80 deg. Simulations performed using a 2D particle in cell code show a very good agreement with the experimental data for a plasma profile of L/{lambda}{approx_equal}0.01.

• OSTI ID: 21134053
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 24 Vol. 100; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION
INCIDENCE ANGLE
LASERS
PLASMA RADIAL PROFILES
POLARIZATION
PULSES
SAPPHIRE
SIMULATION