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Abstract

A method for preparing a poled structure comprises the steps of forming a ferroelectric substrate having a top surface and a bottom surface, performing a doping process to form at least one inhibition block in the ferroelectric substrate, forming an electrode structure including a first electrode and a second electrode on the top surface and a third electrode on the bottom surface and applying a predetermined voltage to the electrode structure to form a plurality of inverted domains outside of the inhibition block in the ferroelectric substrate. The ferroelectric substrate has a first polarization direction and a first crystal structure, the inhibition block has a second crystal structure different from the first crystal structure, and the inverted domains have a second polarization direction substantially opposite to the first polarization direction.

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First Claim