Schedule Aug 01, 2006
High Harmonics and Attosecond Pulses in Relativistic Regime
Alexander Pukhov (Univ. Düsseldorf)

We show analytically and numerically that the spectrum of high harmonics produced when a relativistically intense laser pulse interacts with an overdense plasma surface is a slow decaying power law In/I0 ~ 1/n-8/3. This spectrum has been recently confirmed in the experiment done by Dromey et al on the VULCAN laser [1]. The high harmonics emerge as a train of (sub-)attosecond pulses [2]. Laser polarization control allows to select a single attosecond pulse out of this train [3].

[1] Dromey, B. et al. "High harmonic generation in the relativistic Limit," Nature Phys. 2, 456-459 (2006).
[2] A. Pukhov X-rays in a flash, Nature Phys. 2, 439 (2006)
[3] T. Baeva, S. Gordienko, A. Pukhov, "Theory of high harmonic generation in relativistic laser interaction with overdense plasma," arXiv:physics/0604228 v1, 28 Apr (2006)

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