Preparation method of large thickness period polarization ferroelectric crystal material

Abstract

The invention discloses a preparation method of a large thickness period polarization ferroelectric crystal material, which includes evaporating a transparent electrode on the +z face of the large thickness period polarization ferroelectric crystal material, bonding the +z face of the ferroelectric crystal material evaporated with the transparent electrode with the +z face of another ferroelectric crystal material to obtain a composite ferroelectric crystal, evaporating metal electrodes on the upper face and the lower face of the composite ferroelectric crystal and polarizing the ferroelectric crystal of the metal electrodes evaporated with the metal electrodes to obtain the large thickness period polarization ferroelectric crystal material. By means of the preparation method, the large thickness period polarization ferroelectric crystal material can be prepared.

Description

technical field [0001] The invention relates to the technical field of crystal material processing, and discloses a preparation method of a large-thickness periodically polarized ferroelectric crystal material. Background technique [0002] Quasi-phase-matching (Quasi-phase-matching) is an important technology of nonlinear optical frequency conversion. Its idea was first proposed by J.Armstrong et al. in 1962, and V.Berger extended it to two-dimensional structures in 1998, and Propose the concept of nonlinear photonic crystal nonlinear photonic crystal. Momentum conservation is required in nonlinear frequency conversion, which is difficult to achieve in ordinary nonlinear crystals due to the existence of dispersion, especially when multiple nonlinear interactions occur at the same time, but the reciprocal lattice vector provided by nonlinear periodic structures can be easily achieve phase matching. By constructing a periodic structure (nonlinear photonic crystal) in a nonl...

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Problems solved by technology

[0008] In view of this, the main purpose of the present invention is to provide a method for preparing a large-thickness periodically polarized ferroelectric crystal material, to solve the problem of preparing a large-thickness periodic and quasi-periodic periodic inversion ferroelectric crystal material, to achieve large-scale Purpose of Thickness Periodic and Quasi-Periodic Periodic Inversion Ferroelectric Crystal Materials

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