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Microcavity growth method based on nanocrystalline self-assembling

A growth method and self-assembly technology, applied in the direction of single crystal growth, single crystal growth, crystal growth, etc., can solve the problems of high cost, large laser threshold, increased light loss, etc., and achieve high mode quality factor and good crystal quality. Effect

Active Publication Date: 2018-06-22
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the distributed Bragg reflector (DBR) structure and the vernier effect between two or more microcavities can obtain single-mode lasing, this method generally requires precise etching, which is expensive and complicated to operate.
Reducing the size of the microcavity to the sub-micron level is a means to obtain a single-mode laser output, but reducing the size will cause increased light loss and lead to a large laser threshold

Method used

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  • Microcavity growth method based on nanocrystalline self-assembling
  • Microcavity growth method based on nanocrystalline self-assembling
  • Microcavity growth method based on nanocrystalline self-assembling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) 4ml octadecene, 1ml oleylamine, 0.5ml oleic acid, 69mg PbBr 2 Add it into a three-necked flask, degas the said three-necked flask containing raw materials at 100°C for 10 minutes, and continue to mix thoroughly at 100°C for 30 minutes, then raise the temperature to 180°C in an Ar gas atmosphere and keep it for 10 minutes.

[0030] (2) 0.4ml of cesium oleate was quickly injected into the three-neck flask, and after 5s, it was rapidly cooled in an ice-water bath at 0°C. CsPbBr 3 The quantum dots have an average size of 10 nm, and after centrifugation, they are dissolved in toluene at a concentration of 10 mg / ml.

[0031] (3) Take 1ml of the 10mg / ml quantum dots and put them in a brown vial to avoid light and deposit at 4°C.

[0032] (4) After 15 days, use a syringe to absorb a small amount of deposited quantum dots and drop them on a clean silicon wafer. The toluene will evaporate naturally, and any vibration should be avoided during the whole process.

[0033] Qua...

Embodiment 2

[0035] This embodiment mainly refers to the preparation process of rectangular microsheets, the reaction temperature in the preparation process of quantum dots, the amount of oleylamine added, the solvent of quantum dots, the concentration of quantum dots, the deposition temperature, the deposition time, and the influence of the substrate on the formation process. The specific implementation process refers to Example 1. The difference is that the reaction temperature, the amount of oleylamine added, the quantum dot solvent, the deposition temperature, and the substrate were changed respectively during the preparation of quantum dots. The specific experimental parameters are shown in Table 1.

[0036] Table 1 The embodiment conditions of the preparation method of the rectangular sheet microcavity of the present invention

[0037]

[0038] Experiments show that changing the reaction temperature in the preparation process of quantum dots is from 170°C to 190°C. The higher the t...

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Abstract

The invention discloses a microcavity growth based on nanocrystalline self-assembling. The method comprises the following steps: perovskite quantum dot passivation treatment, low-temperature deposition treatment, and microcavity structure acquisition. The quality of the monocrystalline is improved through a self-assembling way, and the monocrystalline size can be controlled, thereby providing extremely important significance for the production of high-quality single-mode laser.

Description

technical field [0001] The invention relates to a method for controlling the growth of a laser microresonator, in particular a method for low-temperature growth of a rectangular perovskite microresonator based on nanocrystal self-assembly. This method is of great significance for the realization of high-quality single-mode lasers. Background technique [0002] The growth method of microcavities with precise control of specific size and morphology is important to realize high-quality novel functional devices. In general, chemical vapor deposition and solution synthesis methods are better choices. However, the high temperature and special gas atmosphere of chemical vapor deposition significantly increase the cost, and the excessive surfactant in the solution synthesis method also affects the performance of the sample. Self-assembly is a gentle way to control the growth of structures. [0003] Single-mode lasers have attracted considerable attention due to their applications...

Claims

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Application Information

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IPC IPC(8): C30B29/12C30B7/08C30B7/14B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00C30B7/08C30B7/14C30B29/12
Inventor 张龙周纯董红星虞杰常浩唐冰周贝尔
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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