Radiation defects in Dy3+ doped LiNbO3 single crystals

Effect of Annealing and Irradiation on the Optical Properties of Oxide Crystals

“…As was found earlier [4], this CC is associated with oxide vacancies in Cr:SLGO single crystal. Moreover, for both types of the above named treatments the AA band appears at about 270 nm.…”

“…5a recharging process of dysprosium ions is also seen for Dy 3 +:LN crystal (see changes in absorption spectrum for wavelengths greater than 800 nm). This suggests that Dy 2 + ions are probably present in the as-grown crystals [7]. Figure 6 shows absorption (curve 1), additional absorption after γ-irradiation with a dose of 10' Gy (curve 2), and 10 6 Gy (curve 3) and luminescence after this irradiation (curve 4) observed for LiF single crystal.…”

“…Moreover, for both types of the above named treatments the AA band appears at about 270 nm. This CC is attributed to GaS+ -ł Ga t + reaction leading to the shift of a short-wave absorption edge [4].…”

Influence of Annealing and Irradiation by Heavy Ions on Optical Absorption of Doped Lithium Niobate Crystals

“…For LNO:Fe slight maximum near 21000 cm −1 is observed, which may be associated with Fe 2+ iron ions. In contrast to the irradiation by protons [15], the authors of the paper [18] also observed that irradiation of LNO crystal by 5.17 MeV/u 155 Gd ions at room temperature with fluence extended from 1.5 × 10 11 to 1.2 × 10 12 ions cm −2 produce unstructured additional absorption.…”

“…However, the CC formation in these * corresponding author; e-mail: ppotera@univ.rzeszow.pl crystals under the ion irradiation was studied insufficiently, and was performed practically only for light ions (for example 25 MeV protons, 150 keV Ar + ions) or for low-energy heavy ions (for example 23 keV Au + , 60 keV Cu + ) [14][15][16][17]. The optical absorption of LNO irradiated by swift heavy ions was studied only for 0.8 GeV 155 Gd ions [18] and 3 MeV Cu ions [19].…”