| 摘要 |
A wavelength conversion device 1 has a supporting body 8, a wavelength conversion substrate 2, a lower side buffer layer 6 provided on the side of a bottom face 2b of the substrate 2, a upper side buffer layer 9 provided on the side of a upper face 2a of the substrate 2, and an adhesive layer 7 adhering the supporting body 8 and the lower side buffer layer 6. The wavelength conversion substrate 2 is made of a Z-plate of a ferroelectric single crystal and a periodic polarization inversion structure 5 formed therein. The supporting body 8 has a volume resistivity lower than that of the ferroelectric single crystal of the wavelength conversion substrate 2.
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