| 摘要 |
Provided is a method for manufacturing an optical element, the method including: an electrode forming step of forming metal films on the plus z face and minus z face of a ferroelectric substrate to fabricate electrodes; a periodic electrode forming step of forming the metal film on the plus z face into a periodic electrode; a polarization reversal forming step of applying a voltage between the periodic electrode and the electrode on the minus z face to form polarization-reversed regions in the ferroelectric substrate; a surface treating step of removing the electrode, the periodic electrode, and surface layers on the plus z face and minus z face of the ferroelectric substrate; and an annealing step of applying predetermined heat to the ferroelectric substrate having the surface layers removed therefrom.
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