Two Topics of Optical Excitation Dynamics, Newly Unveiled by the Time- and Momentum-Resolved Photo-E
Author: Ohnishi, Hiromasa; Tomita, Norikazu. 2018.
Publication: Applied Sciences 2018, Vol. 8, Page 1788
CITE.CC academic search helps you expand the influence of your papers.
Abstract
We review the recent two topics of optical excitation and relaxation dynamics, newly unveiled by the time- and momentum-resolved photo-electron emission from the conduction band of GaAs. One is the real-time collective relaxation dynamics, resulting in the Fermi degeneracy formation in the &Gamma valley. We show that it takes almost infinite time to realize the exact Fermi degeneracy, due to a restricted selection rule for the intravalley transition of the photo-excited electrons. The other is the spontaneous and instantaneous intervalley transition from the &Gamma valley to the L one. By considering the electron-phonon coupling before the photo-excitation, such spontaneous intervalley transition is realized within the framework of the Franck&ndashCondon principle of the photo-excitation.
Cite this article
Ohnishi H, Tomita N. Two Topics of Optical Excitation Dynamics, Newly Unveiled by the Time- and Momentum-Resolved Photo-Electron Emission from the Conduction Band of GaAs: A Theoretical Review. Applied Sciences. 2018; 8(10):1788.https://doi.org/10.3390/app8101788
