Laboratoire Francis PERRIN
URA CNRS-CEA 2453
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Extreme light in nanostructured targets: shaping fields and managing particle flows Séminaires SPAM LFP
vers calendrier
24/10/2013 à 11h00
LIDYL Bât 522, p 138 CEA-Saclay
Robin S. Marjoribanks

2832.pdf (2 Ko)

The more intense that laser pulses can be made, the more surprising and extreme are the interaction effects researchers are seeing -- effects that are sometimes hard to control.  One way to guide or redirect the physics relationships is to manipulate the composition or shape of targets. Nickel nanowires present >95% optical absorption into an effective skin-depth that is very long, greater than 1 μm. Partly this is due to the strong optical anisotropy of these oriented nanostructures: a dielectric in the transverse direction and a conductor along the optical axis. Under intense irradiation, and especially at relativisitic optical intensities, this can lead to transition from dielectric to conductor, strong J×B effects, nonlinear acceleration of electrons and the generation of high harmonic radiation. I'll outline our new theoretical and experimental results for intensities from small-signal up to very clean relativistic pulses.