Imaging energy-, momentum-, and time-resolved distributions of photoinjected hot electrons in GaAs

Jun'ichi Kanasaki, Hiroshi Tanimura, Katsumi Tanimura

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

Using time-and angle-resolved photoemission spectroscopy, we determine directly energy-, momentum-, and time-resolved distributions of hot electrons photoinjected into the conduction band of GaAs, a prototypical direct-gap semiconductor. The nascent distributions of photoinjected electrons are captured for different pump photon energies and polarization. The evolutions of hot electron distributions in ultrafast intervalley scattering processes are resolved in momentum space with fs-temporal resolution, revealing an intervalley transition time as short as 20 fs.

Original languageEnglish
Article number237401
JournalPhysical review letters
Volume113
Issue number23
DOIs
Publication statusPublished - 2014 Dec 2
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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