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A damage-free and controllable method for preparing nitrogen-vacancy centers in diamond

A diamond, non-destructive technology, applied in the field of quantum technology and precision testing materials, to achieve long-term stability of the temperature field, broaden the application field, and promote the effect of the application field

Active Publication Date: 2022-02-25
QUFU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at many problems existing in the application of existing diamond N-V centers, the present invention provides a method that can realize the controllable preparation of N-V centers in the diamond growth process, and improves the iron-nickel catalyst by using non-metallic elements such as sulfur, phosphorus, and calcium, and by adding Nitrogen scavenger and non-metallic composite nitrogen source regulate the nitrogen content inside the diamond, control the growth orientation to regulate the type of internal nitrogen vacancies, use trace element doping and annealing treatment to adjust the internal nitrogen vacancy content and the charge, and obtain large size and high quality , and an effective technical means for diamond single crystal materials with controllable N-V center concentration

Method used

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  • A damage-free and controllable method for preparing nitrogen-vacancy centers in diamond
  • A damage-free and controllable method for preparing nitrogen-vacancy centers in diamond
  • A damage-free and controllable method for preparing nitrogen-vacancy centers in diamond

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Experimental program
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Effect test

Embodiment 1

[0043] A method of non-injuries can control a nitrogen space center in a diamond, using the following steps:

[0044] S1: Preparation of Diamond Single Crystals with Different Content Nitrogen Caves

[0045] (1) Diamond synthesis: Select sulfur to improve the iron nickel catalyst system, using high-purity scale graphite as a carbon source, at 5.0 gPa, 1850 ° C, heat insulation for 10 hours, the size of the synthetic high-quality diamond single crystal is 3-5 mm;

[0046] (2) Regulate the internal nitrogen content of diamond: Add 0.1 wt.% Titanium sheet in the catalyst to obtain a diamond single crystal having a nitrogen-containing concentration range of 0-1 ppm;

[0047] (3) Variable nitrogen hole type: Select {100} seed crystals, control diamond growth temperature at 1400-1450 ° C, to obtain internal N 2 V Center is the {100} crystal;

[0048] S2: Adjust the type of diamond internal nitrogen hole center and charge type

[0049] (4) Adjusting the type and charge transfer: Adjust t...

Embodiment 2

[0052] A method of non-injuries can control a nitrogen space center in a diamond, using the following steps:

[0053] S1: Preparation of Diamond Single Crystals with Different Content Nitrogen Caves

[0054] (1) Diamond Synthesis: Select a non-metallic element such as phosphorus to improve the iron nickel catalyst system, using high-purity scale graphite as a carbon source, at 5.0 gpa, 1850 ° C, thermos 10 hours, the size of the synthetic high-quality diamond single crystal is 3-5mm;

[0055] (2) Regulate the internal nitrogen content of diamond: Add 0.1 wt.% C in the carbon source 3 N 3 (NH 2 ) 3 , Obtain a diamond single crystal having a nitrogen-containing concentration range of 200-1000 ppm;

[0056] (3) Variable nitrogen hole type: Select {100} seed crystals, control diamond growth temperature at 1400-1450 ° C, to obtain internal N 2 V Center is the {100} crystal;

[0057] S2: Adjust the type of diamond internal nitrogen hole center and charge type

[0058] (4) Adjusting the ...

Embodiment 3

[0061] A method of non-injuries can control a nitrogen space center in a diamond, characterized in that the following steps are employed:

[0062] S1: Preparation of Diamond Single Crystals with Different Content Nitrogen Caves

[0063] (1) Diamond synthesis: Select the sulfur non-metal element to improve the iron nickel catalyst system, using high-purity scale graphite as a carbon source, at 6.0 gpa, 1550 ° C, heat insulation 40 hours, the size of the synthetic high-quality diamond single crystal is 3 -5mm;

[0064] (2) Regulate the internal nitrogen content of diamond: 1 wt.% Titanium sheet is added in accordance with the mass ratio to obtain a diamond single crystal having a nitrogen-containing concentration range of 0-1 ppm;

[0065] (3) Controllable nitrogen hole type: Select {100} seed crystals, control diamond growth temperature at 1500-1550 ° C, to obtain internal NV 0 NV - The center is the main {100} crystal;

[0066] S2: Adjust the type of diamond internal nitrogen hole...

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Abstract

The invention discloses a non-damaging and controllable method for preparing nitrogen vacancy centers in diamond. By selecting a non-metallic catalyst and a nitrogen source, the ferromagnetic defects inside the synthetic diamond are reduced, and the content of nitrogen impurities inside the synthetic diamond is controlled. By controlling the growth crystal direction The matching with the temperature precisely controls the formation type of nitrogen vacancies inside the diamond. The high temperature and high pressure annealing technology is used to quickly and effectively adjust the type of nitrogen vacancies and the number of charges inside the diamond, and a controllable NV 0 , NV ‑ , N 2 V and other nitrogen vacancy centers, thus effectively solving the problem that the lack of nitrogen vacancy controllable preparation technology seriously limits its further industrial application.

Description

Technical field [0001] The present invention belongs to the technical field of quantum technologies and precision test materials, and therefore referring to a method of non-injurious injury to control the nitrogen space center in a diamond. Background technique [0002] Quantum technology is an emerging cross discipline that combines quantum theory and informationism. It uses "quantum superposition" and "quantum entangled" effect to store information in "quantum bits", reach super fast parallel computing power, in supercarcies, information processing, Artificial intelligence, information security and other applications have traditional computers unparalleled advantages. In recent years, as quantum techniques come from theory to experiment, successfully develop quickly from laboratory, so that they have broad application prospects in national economic, science and technology and military, and quickly become the international quantum physics and information science. Research hotspo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J3/06
CPCB01J3/06
Inventor 刘晓兵陈欣宋京岩李凤娇
Owner QUFU NORMAL UNIV
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