MANUFACTURING METHOD OF SUBSTRATE HAVING PERIODICAL POLARIZATION INVERSION REGION

摘要

PROBLEM TO BE SOLVED: To manufacture a substrate having a periodical polarization inversion region without needing complicated constitution for applying pulse voltage and complicated constitution for applying a ferroelectric field.

SOLUTION: The polarization inversion region is formed by using a substrate consisting of a single crystal of lithium tantalate having a stoichiometric composition or a composition near to the stoichiometric composition and applying a DC electric field having≤5 [kV/mm] electric field intensity to the substrate for≥1 [sec].

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