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Coffee ring laser containing silver selenide quantum dots and preparation method thereof

A technology of quantum dots and silver selenide, which is applied in the field of semiconductor optoelectronic devices, can solve the problems of reducing the stability and life of lasers, and achieve high stability and improve stability and life.

Inactive Publication Date: 2019-02-01
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, directly exposing the quantum dots to air reduces the stability and lifetime of the laser

Method used

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  • Coffee ring laser containing silver selenide quantum dots and preparation method thereof
  • Coffee ring laser containing silver selenide quantum dots and preparation method thereof

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Embodiment Construction

[0020] The present invention will be further explained below in conjunction with the accompanying drawings.

[0021] like figure 2 As shown, the coffee ring laser containing silver selenide quantum dots of the present invention includes a quartz substrate 2 arranged upwards in sequence, and a silicon dioxide ring 3 containing silver selenide quantum dots.

[0022] The silicon dioxide ring 3 containing silver selenide quantum dots is composed of a silicon dioxide ring and silver selenide quantum dots 1 embedded in the silicon dioxide ring. The silver selenide quantum dots 1 are evenly distributed in the silicon dioxide ring. Silver Selenide Quantum Dots 1 as figure 1 shown. The silver selenide quantum dot 1 is an optical gain medium, and the silver selenide quantum dot 1 with only double spin degeneracy in the lowest quantum state with low toxicity can realize near-infrared optical gain with a low threshold. Embedding silver selenide quantum dots 1 into silicon dioxide can...

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Abstract

The present invention discloses a coffee ring laser containing silver selenide quantum dots. The coffee ring laser comprises a quartz substrate and a silicon dioxide circular ring containing silver selenide quantum dots which are arranged upwards in order. The coffee ring laser replaces the minimum quantum state 8-fold degenerate lead salt quantum dots with the harmfulless minimum quantum state 2-fold degenerate silver selenide quantum dots to achieve the near-infrared light gain of a low threshold value. The quantum dots are inlaid into the silicon dioxide to improve the stability and the life of the laser. The mixing liquid of the silver selenide quantum dots and perhydro polysilazane is employed to prepare a coffee ring to finally obtain a coffee ring near-infrared light quantum dot laser with a low threshold value, high stability and a friendly environment.

Description

technical field [0001] The invention relates to a coffee ring laser containing silver selenide quantum dots and a preparation method thereof, belonging to the technical field of semiconductor optoelectronic devices. Background technique [0002] Near-infrared lasers can be widely used in fields such as optical communication, remote sensing, and coherent plasma generation. Benefiting from the quantum confinement effect, semiconductor quantum dots exhibit a variety of superior properties as optical gain materials, such as tunable emission wavelength with size, potentially low laser threshold and temperature-insensitive laser performance. At present, near-infrared quantum dot lasers prepared by molecular beam epitaxy have begun commercial applications. Compared with epitaxially grown quantum dots, colloidal quantum dots have a smaller size and a more uniform size distribution, so they have stronger quantum confinement effects and narrower emission peaks. The most common near-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/10
CPCH01S5/10
Inventor 廖晨
Owner NANJING UNIV OF POSTS & TELECOMM
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