This work investigates electron dynamics inside bulk solids with femtosecond to sub-100-as light pulses, in particular SiO2 and TiO2. The key findings are: (i) Under resonant excitation with ultrashort UV pulses, a strong correlation has been found between the electronic relaxation of hot electrons in TiO2 and the coherently excited A1g phonon mode. (ii) The highly nonlinear polarization dynamics in SiO2 have been investigated with attosecond transient absorption and nonlinear polarization spectroscopy, showing reversible effects on the sub-femtosecond time-scale.
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This work investigates electron dynamics inside bulk solids with femtosecond to sub-100-as light pulses, in particular SiO2 and TiO2. The key findings are: (i) Under resonant excitation with ultrashort UV pulses, a strong correlation has been found between the electronic relaxation of hot electrons in TiO2 and the coherently excited A1g phonon mode. (ii) The highly nonlinear polarization dynamics in SiO2 have been investigated with attosecond transient absorption and nonlinear polarization spect...
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