Ultrafast Intervalley Transitions in GaN Single Crystals

  title={Ultrafast Intervalley Transitions in GaN Single Crystals},
  author={Shuai Wu and Peter Geiser and Jin-Taek Jun and Janusz Karpinski and Roman Sobolewski},
  journal={2007 Conference on Lasers and Electro-Optics (CLEO)},
We have studied time-resolved intervalley transitions of electrons between the conduction band Gamma and L valleys in bulk GaN crystals using a two-color, femtosecond, pump-probe technique. The transition threshold and intervalley scattering times were determined.