Light absorption in mono- And polycrystalline YAG:Nd samples under pulsed electron irradiation

R. V. Emlin, V. Yu Yakovlev, V. D. Kulikov, V. A. Shitov, R. N. Maksimov

Результат исследований: Материалы для журналаСтатьярецензирование

Аннотация

We studied the onset of induced optical absorption in mono- and polycrystalline Y3Al5O12:Nd3+ samples upon irradiation by a nanosecond electron beam with electron energy of 250 keV and current density of 25 A/cm2. We show that in such crystalline samples, the fast electrons produce induced absorption between 1 and 4.2 eV expressed as a superposition of six adjacent elementary lines. We found that the induced absorption is due to electron transitions from the valence band to a local level around an O-hole center, while the initial-phase (10−7−10−4 s) relaxation of the induced absorption is determined by quadratic recombination of conduction-band electrons with the O-hole centers. The higher density of structural defects in the polycrystalline sample than the monocrystalline sample increases the band-electron lifetime against capture by O centers.

Язык оригиналаАнглийский
Страницы (с-по)318-322
Число страниц5
ЖурналJournal of Optical Technology (A Translation of Opticheskii Zhurnal)
Том87
Номер выпуска5
DOI
СостояниеОпубликовано - 1 мая 2020

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering(all)
  • Computational Mathematics
  • Applied Mathematics

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