35 citations · 119 across the 14 of their papers we have counts for
14 papers
Orientation-dependent high harmonic generation in ZnO
Tzveta Apostolova, Balint Kiss, Deborata Rajak +6
We theoretically and experimentally investigate orientation-dependent high-harmonic generation (HHG) in zinc oxide subjected to intense femtosecond mid-infrared (MIR) laser pulses.…
High-harmonic generation in zinc oxide subjected to intense mid-infrared femtosecond laser pulse
Boyan Obreshkov, Tzveta Apostolova
We theoretically investigate photo-excitation of electron-hole pairs and high harmonic generation in the bulk of zinc oxide (ZnO) subjected to intense femto-second laser pulses wit…
Femtosecond optical breakdown in silicon
Tzveta Apostolova, Boyan Obreshkov
We investigate photoinization, energy deposition, plasma formation and the ultrafast optical breakdown in crystalline silicon irradiated by intense near-infrared laser pulses with…
Blueshift of high-order harmonic generation in crystalline silicon subjected to intense femtosecond near-infrared laser pulse
Boyan Obreshkov, Tzveta Apostolova
We present the generation of high order harmonics in crystalline silicon subjected to intense near-infrared 30fs laser pulse. The harmonic spectrum extends from the near infrared t…
Ultrafast energy absorption and photoexcitation of bulk plasmon in crystalline silicon subjected to intense near-infrared ultrashort laser pulses
Tzveta Apostolova, Boyan Obreshkov, Iaroslav Gnilitskyi
We investigate the non-linear response and energy absorption in bulk silicon irradiated by intense 12-fs near-infrared laser pulses. Depending on the laser intensity, we distinguis…
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 intense near-infrared laser pulse of photon energy 1.55 eV, time duration of 15 fs…