5 years ago

Sub-cycle dynamics of electron-hole pairs and high-harmonic generation in bulk diamond subjected to intense femtosecond laser pulse.

T. Apostolova, B. Obreshkov

We present calculation of photoexcitation and high-harmonic generation in bulk diamond induced by linearly-polarized intense laser pulse of photon energy 1.55 eV, having a time duration of 15 fs and peak laser intensity $I =$ 10 TW/cm$^2$. Following the excitation, the laser pulse creates electron-hole pairs in a localized region near the Brillouin zone center. Intra- and inter-band harmonics are generated with alternating phase during each half-cycle of the driving pulse. The corresponding intra- and inter-band currents are in definite phase relation relative to the driving pulse, reflecting the build-up of coherent superposition of population between valence and conduction bands, and the deceleration of charge carriers in their respective bands.

Publisher URL: http://arxiv.org/abs/1711.05633

DOI: arXiv:1711.05633v1

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