Multiphoton photoluminescence contrast in switched Mg:LiNbO3 and Mg:LiTaO3 single crystals
Multiphoton photoluminescence contrast in switched Mg:LiNbO3 and Mg:LiTaO3 single crystals
复制标题
DOI：
10.1063/1.4896579
复制
发表时间：
2014-09
影响因子：
4
通讯作者：
P. Reichenbach;T. Kämpfe;A. Thiessen;A. Haußmann;T. Woike;L. Eng
中科院分区：
文献类型：
--
作者：
P. Reichenbach;T. Kämpfe;A. Thiessen;A. Haußmann;T. Woike;L. Eng
在0-7 mol. L-1 Mg掺杂的LiNbO 3（LNO）和LiTaO 3（LTO）单晶中，观察到了原始畴和单开关畴之间的多光子发光对比。%和0-8 mol. %。在3%的范围内的发光对比度测量Mg：LNO样品中的生长和电反转域区域之间，而对比度达到高达30%的Mg：LTO的情况下的值。在退火条件下，观察到畴衬度的指数衰减。对于衰变确定的约1 eV的活化能允许与所报道的相关缺陷的活化能进行比较，清楚地示出了热对比度衰变与H+和Li+-离子迁移率之间的强连接。最后，对氧化样品进行类似的实验无疑证明了所报道的发光对比度的起源与锂离子密切相关。
We observed a multiphoton luminescence contrast between virgin and single-switched domains in Mg-doped LiNbO3 (LNO) and LiTaO3 (LTO) single crystals with different doping levels of 0–7 mol. % and 0–8 mol. %, respectively. A luminescence contrast in the range of 3% was measured between as-grown and electrically inverted domain areas in Mg:LNO samples, while the contrast reaches values of up to 30% for the Mg:LTO case. Under annealing, an exponential decay of the domain contrast was observed. The activation energy of about 1 eV being determined for the decay allowed a comparison with reported activation energies of associated defects, clearly illustrating a strong connection between thermal contrast decay and the H+ and Li+-ion mobility. Finally, performing similar experiments on oxidized samples undoubtedly demonstrated that the origin of the reported luminescence contrast is strongly connected with lithium ions.