Abstract
High harmonics generated on solid surfaces (SHHG) promise a much higher efficiency compared to harmonics generated in gases. In case of ROM (Relativistically Oscillating Mirror) mechanism [1], conversion efficiencies up to the percent level are predicted [2]. An interesting property of ROM is that the maximum photon energy scales with the laser intensity. In addition an isolated attosecond (as) pulse can be generated when using a few-cycle driver pulse. However, for ROM, relativistic laser intensities above 1 × 1018 W/cm2 are required, which in combination with the few-cycle pulse duration is not readily available.
© 2017 IEEE
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