National Research Council of Canada. Security and Disruptive Technologies
high harmonic generation (HHG); solids; nonlinear optics; attoseconds
We review recent progress in understanding the dominant mechanism driving high-harmonic generation in solids. Three-dimensional two-band single active electron calculations predict that the major emission arises from the recombination of electron-hole pairs upon their creation and acceleration in the laser field, in analogy to atomic high-harmonic generation. The main goal of this study is to review a simple quasi-classical trajectory formalism and use it to better understand the fundamental properties of high-harmonic generation in solids and how they compare to high-harmonic generation in atomic and molecular gases. The simple formalism presents a valuable tool for extending attosecond science fromthe gas to the condensed matter phase. This is demonstrated by discussing the potential synthesis of attosecond pulses from solids.
IEEE Journal of Selected Topics in Quantum Electronics21, no. 5, 8700110 (2 March 2015).