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A method for preparing periodic optical superlattice

An optical superlattice, periodic technology, applied in nonlinear optics, optics, optical components, etc., to achieve the effect of small line width

Active Publication Date: 2020-12-01
NANJING NANZHI INST OF ADVANCED OPTOELECTRONIC INTEGRATION NANJING
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Problems solved by technology

[0005] The present application provides a method for preparing a periodic optical superlattice to solve the serious problem of domain lateral expansion in the existing optical superlattice preparation process

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  • A method for preparing periodic optical superlattice
  • A method for preparing periodic optical superlattice
  • A method for preparing periodic optical superlattice

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Embodiment Construction

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0039] In the preparation process of the traditional periodic optical superlattice, periodic electrodes need to be photolithographically etched on the surface of the ferroelectric crystal, and then a voltage is applied to the periodic electrodes to cause domain inversion to occur inside the ferroelectric crystal. In order to prevent the phenomenon of connecting domains caused by serious lateral expansion of domains, it is usually necessary to arrange periodi...

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Abstract

The invention provides a method for preparing a periodic optical superlattice. The method comprises the following steps: carrying out the processing of a ferroelectric crystal, and obtaining a periodic titanium diffusion structure; overlaying a periodic target electrode in a non-diffusion region to form a target substrate; and applying an electric field to the target substrate to form a periodic optical superlattice. According to the method provided by the invention, the target electrode is overlaid in the non-diffusion region, the width of the target electrode is smaller than the width of thenon-diffusion region, and when an electric field is applied to the target substrate, domain overturning occurs in the region corresponding to the target electrode, and a titanium diffusion region adjacent to the target electrode can inhibit transverse expansion of the domain in the region, so that the periodic optical superlattice with relatively small line width can be prepared.

Description

technical field [0001] The present application relates to the technical field of iron electrode crystal polarization, in particular to a method for preparing a periodic optical superlattice. Background technique [0002] Ferroelectrics are a special class of dielectric materials that contain crystals that can spontaneously polarize within a certain temperature range, and the direction of spontaneous polarization can be reversibly shifted with an external electric field, such as LiNbO3, KTP, GaP, and GaAs. The microstructure is introduced into the ferroelectric crystal, so that the positive and negative domains are arranged in a certain way to form an optical superlattice, which is mainly used for laser frequency doubling. Among them, the microstructure can be periodic or non-periodic; it can be one-dimensional or multi-dimensional. At present, the use of periodic poling technology to prepare ferroelectric crystals into optical superlattices has received long-term attention ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B1/00G02F1/355
CPCG02B1/005G02F1/3551G02F1/3558
Inventor 尹志军叶志霖许志城
Owner NANJING NANZHI INST OF ADVANCED OPTOELECTRONIC INTEGRATION NANJING
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