Isolated sub-fs XUV pulse generation in Mn plasma ablation
R. A. GaneevBlackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, UK. [email protected]Tobias WittingBlackett laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, UKC. HutchisonBlackett laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, UKF. FrankBlackett laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, UKMaria TudorovskayaInstitut für Theoretische Physik and Centre for Quantum Engineering and Space-Time Research (QUEST), Leibniz Universität Hannover Appelstraße 2, 30167 Hannover, GermanyManfred LeinInstitut für Theoretische Physik and Centre for Quantum Engineering and Space-Time Research (QUEST), Leibniz Universität Hannover Appelstraße 2, 30167 Hannover, GermanyW. A. OkellBlackett laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, UKA. ZaïrBlackett laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, UKJ. P. MarangosBlackett laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, UKJ. W. G. TischBlackett laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, UK
2012en
ABI
Abstract
We report studies of high-order harmonic generation in laser-produced manganese plasmas using sub-4-fs drive laser pulses. The measured spectra exhibit resonant enhancement of a small spectral region of about 2.5 eV width around the 31st harmonic (~50eV). The intensity contrast relative to the directly adjacent harmonics exceeds one order of magnitude. This finding is in sharp contrast to the results reported previously for multi-cycle laser pulses [Physical Review A 76, 023831 (2007)]. Theoretical modelling suggests that the enhanced harmonic emission forms an isolated sub-femtosecond pulse.
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