Generation of 10 mu W relativistic surface high-harmonic radiation at a repetition rate of 10 Hz

作者：Bierbach J; Roedel C; Yeung M; Dromey B; Hahn T; Pour A Galestian; Fuchs S; Paz A E; Herzer S; Kuschel S; Jaeckel O; Kaluza M C; Pretzler G; Zepf M; Paulus G G^*

来源：New Journal of Physics, 2012, 14(6): 065005.

DOI：10.1088/1367-2630/14/6/065005

Experimental results on relativistic surface HHG at a repetition rate of 10 Hz are presented. Average powers in the 10 mu W range are generated in the spectral range of 51 to 26 nm (24-48 eV). The surface harmonic radiation is produced by focusing the second-harmonic of a high-power laser onto a rotating glass surface to moderately relativistic intensities of 3 x 10(19) W cm(-2). The harmonic emission exhibits a divergence of 26 mrad. Together with absolute photon numbers recorded by a calibrated spectrometer, this allows for the determination of the extreme ultraviolet (XUV) yield. The pulse energies of individual harmonics are reaching up to the mu J level, equivalent to an efficiency of 10(-5). The capability of producing stable and intense high-harmonic radiation from relativistic surface plasmas may facilitate experiments on nonlinear ionization or the seeding of free-electron lasers.

• 出版日期2012-6-7