Temperature dependent domain-wall moving dynamics of lithium niobate during high electric field periodic poling

被引：3
|
作者：
Liu, Qilu [1 ,2 ]
Wang, Fulei [2 ]
Wang, Dongzhou [2 ]
Sun, Dehui [3 ]
Sang, Yuanhua [1 ]
Liu, Hong [1 ,2 ,3 ]
机构：
[1] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
[2] Jinan Inst Quantum Technol, Jinan 250101, Peoples R China
[3] Jinan Univ, Inst Adv Interdisciplinary Res, Jinan 250022, Peoples R China
来源：
JOURNAL OF APPLIED PHYSICS | 2020年 / 128卷 / 22期
基金：
中国国家自然科学基金;
关键词：
SPONTANEOUS POLARIZATION; SIDEWISE MOTION; WAVE-GUIDE; GENERATION;
D O I：
10.1063/5.0029619
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Periodically poled lithium niobate is a widely used material for nonlinear optical frequency conversion by means of quasi-phase matching. Herein, the poling process with the temperature varying from 140 degrees C to 190 degrees C is studied. The required polarization voltage to inverse spontaneous polarization and domain distribution are highly related to the temperature variation, which is assigned to the coercive field change. The obtained domain duty cycle shows that the reduction of the coercive field benefits the control of the domain motion in both the horizontal and vertical directions. The finite element analysis of the applied electric field reveals that nucleation plays a crucial role in the periodic poling process. This work provides a strategy for the control of the domain duty cycle by reducing the coercive field of LiNbO3 crystals.
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页数：8
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