| 摘要 |
PROBLEM TO BE SOLVED: To enable control of grow to be protruded to be easily performed.SOLUTION: A formation method of a periodic polarization inversion structure includes: a region partition step of preparing a ferroelectric crystal substrate 30 being a parallel flat plate cut at a place orthogonal to a direction of a spontaneous polarization and a signal domain, and providing a periodic belt-like region 12a and a charge amount adjustment region B for adjusting a charge transfer amount on a first main surface 30a of the ferroelectric crystal substrate; and a polarization inversion structure formation step of applying polarization inversion voltage between the first main surface of the ferroelectric crystal substrate and a second main surface facing the first main surface. |
