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DOI: 10.17586/1023-5086-2020-87-05-89-95
УДК: 535.33
Light absorption in mono- and polycrystalline YAG:Nd samples under pulsed electron irradiation
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Publication in Journal of Optical Technology
Емлин Р.В., Яковлев В.Ю., Куликов В.Д., Шитов В.А., Максимов Р.Н. Поглощение света в образцах моно- и поликристаллического YAG:Nd при импульсном электронном облучении // Оптический журнал. 2020. Т. 87. № 5. С. 89–95. http://doi.org/10.17586/1023-5086-2020-87-05-89-95
Emlin R.V., Yakovlev V.Yu., Kulikov V.D., Shitov V.A., Maksimov R.N. Light absorption in mono- and polycrystalline YAG:Nd samples under pulsed electron irradiation [in Russian] // Opticheskii Zhurnal. 2020. V. 87. № 5. P. 89–95. http://doi.org/10.17586/1023-5086-2020-87-05-89-95
R. Emlin, V. Yakovlev, V. Kulikov, V. Shitov, and R. Maksimov, "Light absorption in mono- and polycrystalline YAG:Nd samples under pulsed electron irradiation," Journal of Optical Technology. 87, 318-322 (2020). https://doi.org/10.1364/JOT.87.000318
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 25A/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 (10−7−10−4s) 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.
yttrium-aluminum garnet, transmission spectra, absorbance, induced absorption
OCIS codes: 160.3380, 140.3380, 140.7240, 300.1030
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