Crystal growth and spectroscopic properties of uranium dioxide doped LiNbO3 with multiband absorption

The Influence of In3+ on the Crystal Growth and Visible Band Photorefraction of Uranium-Doped Lithium Niobate Single Crystals

“…These efforts enhanced some parameters about the photorefractive properties, but are still far from meeting the requirement of the commercial Crystals 2024, 14, 380 2 of 12 holographic application. Recent research has suggested that doping lithium niobate (LN) with high-valence ions, including V [14], Mo [15] and U [8,16], could more effectively enhance its PR properties. In particular, our group has grown a series of uranium ion-doped LN (LN: U) crystals and investigated their PR properties.…”

Photorefraction of uranium-doped lithium niobate crystals at multiple visible wavelengths

“…The small deviation may be ascribed to the refinement assumption that all of the U ions exist as U 6+ in LN, but actually, they have three different valences. 39 Thus, it is reasonable that U 6+ tends to occupy the normal Nb-site and push regular Nb 5+ to the Li-site, forming new defects of U + Nb and a larger amount of anti-site Nb 5+ (Nb 4+ Li ) in LN:U, which is similar to the Mo 6+ ions in LN:Mo. 29,41 The photorefractive dominant carrier types and carrier migration mechanism of LN:U were studied by the light amplification experiment.…”

“…In our previous study, UO 2 was chosen as the dopant to grow LN (LN:U), with U 4+ , U 5+ , and U 6+ ions eventually existing in it. 39 It is of great possibility to form new defects occupying the Nb-site to enhance the PR properties of LN just as what occurred in LN:Mo. 29 In this paper, the visible photorefraction of LN:U was systematically investigated.…”