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Method for inducing surface metallicity of lithium niobate by laser

A laser-induced, surface metal technology, applied in the usage of superconductor elements, chemical instruments and methods, single crystal growth, etc., can solve the problems of easy introduction of impurities, inconvenient regulation, etc., to avoid high temperature and low vacuum environment, and the preparation process is simple. Efficient and easy to control effect

Pending Publication Date: 2022-07-08
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional method is limited by the quality of the target material, it is easy to introduce impurities, and it also needs to provide large-scale thermal temperature field and other experimental conditions, which is very inconvenient to control in the experiment

Method used

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  • Method for inducing surface metallicity of lithium niobate by laser
  • Method for inducing surface metallicity of lithium niobate by laser
  • Method for inducing surface metallicity of lithium niobate by laser

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A method for laser-induced surface metallicity of lithium niobate, comprising the following steps:

[0032] 1) Pretreatment: Choose lithium niobate crystals with orientation , size 5*5*0.5mm, immerse in 99% ethanol solution for ultrasonic cleaning for 10 minutes, and then air dry naturally.

[0033] 2) Setting the preparation environment: fix the cleaned lithium niobate crystal in a vacuum chamber, and adjust the laser irradiation surface of the lithium niobate to be 90° with the laser incident direction. First vacuum the vacuum chamber to 1*10 -3 Pa, and then pass oxygen into the cavity, so that the vacuum degree reaches 5*10 -3 Pa.

[0034] 3) Laser irradiation: First, adjust the laser parameters, set the pulse laser energy to 115mJ, the wavelength of 248nm, and the frequency of 1Hz. Load the pulsed laser so that the entire surface of the lithium niobate is completely exposed in the center of the spot, and let the laser irradiate the surface of the lithium niobate ...

Embodiment 2

[0040] Compared with Embodiment 1, the difference between this embodiment is that in step 3), the laser pulse time is 15s, that is, 15 pulses of laser light, and the rest of the steps are the same as those in Embodiment 1.

Embodiment 3

[0042] Compared with Embodiment 1, the difference between this embodiment is that in step 3), the laser pulse time is 30s, that is, 30 pulses of laser light, and the rest of the steps are the same as those in Embodiment 1.

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Abstract

The invention relates to a method for inducing surface metallicity of lithium niobate by laser. 0001 gt, 0001 gt; the method comprises the following steps: pretreating the surface of a flaky lithium niobate crystal, then putting the lithium niobate crystal on a substrate seat in a vacuum chamber, vacuumizing a cavity of the vacuum chamber, introducing oxygen, finally loading pulse laser, directly and continuously irradiating the surface of the lithium niobate crystal, and finally inducing to generate a metallic conductive layer on the surface of the lithium niobate crystal. According to the method, the metallicity can be simply and efficiently realized on the surface of the lithium niobate.

Description

technical field [0001] The invention belongs to the technical field of lithium niobate preparation, and relates to a method for laser-induced surface metallicity of lithium niobate, in particular to a preparation method of lithium niobate with surface metallicity. Background technique [0002] Perovskite oxides show extremely extensive research value in the field of inorganic non-metallic functional materials, because their simple cubic structure provides the basis for realizing high-quality interfacial and superlattice structures, such as: two-dimensional electron gas, high temperature Superconductivity, quantum Hall effect, giant magnetoresistance effect, ferroelectric, ferromagnetic, multiferroic, etc. Oxide two-dimensional electron gas systems have double or even multiple coupling effects with other physical and chemical properties on the same substance, and have extremely high research value, such as ferroelectric metals. The conduction electrons in the metal shield th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/30C30B33/02
CPCC30B29/30C30B33/02Y02E40/60
Inventor 金克新申津州王定邦
Owner NORTHWESTERN POLYTECHNICAL UNIV
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