Affiliation:
1. Max Planck Institute for the Structure and Dynamics of Matter and Center for Free-Electron Laser Science
2. Imagine Optic
Abstract
An interesting property of high harmonic generation in solids is its laser polarization dependent nature which in turn provides information about the crystal and band structure of the generation medium. Here we report on the linear polarization dependence of high-order harmonic generation from a gallium arsenide crystal. Interestingly, we observe a significant evolution of the anisotropic response of above bandgap harmonics as a function of the laser intensity. We attribute this change to fundamental microscopic effects of the emission process comprising a competition between intraband and interband dynamics. This intensity dependence of the anisotropic nature of the generation process offers the possibility to drive and control the electron current along preferred directions of the crystal, and could serve as a switching technique in an integrated all-solid-state petahertz optoelectronic device.
Funder
French ASTRE program
Agence Nationale de la Recherche
H2020 Future and Emerging Technologies
Subject
Atomic and Molecular Physics, and Optics
Cited by
2 articles.
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