Depolarization field mitigated domain engineering in nickel diffused lithium tentalate
Journal
Applied Physics Letters
Journal Volume
92
Journal Issue
9
Pages
92903
Date Issued
2008-03
Author(s)
Abstract
We demonstrated a domain reversal mechanism on Z-cut congruent-grown lithium tentalate (LiTaO3) composed of nickel (Ni) diffusion followed by pulse field poling. Domain nucleation and forward growth were found confined to the nondiffused regions, where the commonly observed serrated domain fronts in poled LiTaO3 were absent in this work. These observations are ascribed to the formation of domain nucleation barrier by the depolarization field and reveal the divergence effect in the ferroelectric spontaneous polarization at the domain boundary due to Ni diffusion. This mechanism simplifies the fabrication of periodically poled LiTaO3 for second-harmonic generation in the blue spectral regime.
Type
journal article