Journal
APPLIED PHYSICS LETTERS
Volume 92, Issue 9, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2890728
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We demonstrated a domain reversal mechanism on Z-cut congruent-grown lithium tentalate (LiTaO(3)) 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 LiTaO(3) 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 LiTaO(3) for second-harmonic generation in the blue spectral regime. (c) 2008 American Institute of Physics.
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