| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical element substrate capable of forming a polarization inversion structure of high accuracy even when a ferroelectric crystal wherein current easily flows in a region where the polarization inversion structure is formed is used and to provide a wavelength conversion device using the substrate. SOLUTION: In the optical element substrate 1 comprising a ferroelectric material for manufacturing the wavelength conversion device having a structure (the polarization inversion structure) wherein a spontaneous polarization direction of the ferroelectric crystal having a secondary nonlinear effect is periodically inverted, a charge movement limiting layer 3 for limiting a movement amount of a charge moved along the spontaneous polarization direction when the polarization inversion structure is formed, is provided on one surface orthogonal to spontaneous polarization of a ferroelectric layer 2 of the optical element substrate 1 wherein the polarization inversion structure is formed. COPYRIGHT: (C)2007,JPO&INPIT |
