Controlling isolated attosecond pulse generation in MoSe2 using polarization gating and TDDFT simulations
摘要
The dependence of high harmonic generation spectra in solids on the driving wavelength remains an open question, especially regarding its impact on the generation of isolated attosecond pulses. Achieving active control over isolated attosecond pulse generation remains challenging due to the complex dynamics underlying solid-state high harmonic generation. In this work, we investigate high harmonic generation and the corresponding attosecond pulses generated from monolayer molybdenum diselenide using a real-time, ab initio time-dependent density functional theory approach. Our results reveal a linear increase in harmonic cutoff energy with driving wavelength, both parallel and perpendicular to the laser polarization direction. Using a polarization gating technique with symmetric amplitude components, we evaluate attosecond pulse isolation across multiple wavelengths and identify 2.5