Towards attosecond pulse synthesis from solids: spectral shaping, field autocorrelation, and two-color harmonic generation

Abstract

Harmonic generation from solid surfaces is a promising tool for producing high energy attosecond pulses. We report shaping of the harmonic spectrum to achieve the bandwidth necessary for attosecond pulse generation. The shaping is demonstrated for lower as well as for higher harmonics using single and two-pulse pumping. The measured harmonic field autocorrelation function exhibits attosecond spikes in good agreement with the harmonic spectrum. Double slit experiments reveal a high spatial coherence of the harmonic beam.

arXiv comment9 pages, 8 figures

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• Photoionization in the time and frequency domain
• Relativistic Doppler effect: universal spectra and zeptosecond pulses
• Enhanced relativistic harmonics by electron nanobunching
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• Quantum mechanical approach to probing the birth of attosecond pulses using a two-color field