Electric-field poling in Mg-doped LiNbO3

Abstract

We report on electric-field poling of MgO:LiNbO3 (MgLN) using patterned electrodes. Investigation of electric properties of MgLN reveals that polarization switching causes reversible resistance change and that this phenomenon can explain the physical mechanism of random domain growth. Based on these results, we propose a domain-control method in MgLN single crystals by suppressing resistance reduction during the poling process. Using this method, short periodic structures consisting of submicron domain geometries have been achieved in X-, Y-, and Z-cut MgLN crystals. High performances of these periodic domain-inverted structures are also demonstrated by evaluating their potentials as second-harmonic generation devices.

Polarization reversal induced by heating-cooling cycles in MgO doped lithium niobate crystals

“…First, the stable single domain state or tailored domain pattern is crucial for the optical devices used at the elevated temperatures. 15,16 Second, the cooling after pulse heating can be used for producing of the stable micro-and nanodomain structures. [17][18][19][20][21][22][23][24][25][26] The utilization of both antagonistic effects needs deep understanding of the domain structure evolution under the action of pyroelectric field which appears during heating-cooling cycles.…”

Dielectric Permittivity Enhancement By Charged Domain Walls Formation In Stoichiometric Lithium Niobate

“…1b). This leakage contribution was previously attributed to the conductivity through the CDWs that interconnected the polar surfaces [12,13]. Ex situ visualization of the domain structure on the Y section allowed us to measure the average CDW inclination angle as 0.7 ∘ (Fig.…”

Compact and Highly Efficient Intracavity SHG Green Light Source with Wide Operation Temperature Range Using Periodically Poled Mg:LiNbO3

“…To utilize best potential of PPMgLN, we have developed high-voltage application technique 9) . A uniform PPMgLN with 7μm period and high conversion efficiency of 2.8%/Wcm which is nearly equal to the theoretical value were achieved over large area of 1-mm thick crystal.…”