Distributed feedback laser containing silver sulfide quantum dots and preparation method thereof

A technology of distributed feedback and quantum dots, which is applied in the direction of lasers, phonon exciters, laser components, etc., can solve the problems of poor photothermal stability of organic polymers, affecting the stability and life of lasers, and achieve high stability.

Inactive Publication Date: 2019-02-15
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Organic polymers have poor photothermal stability, which affects laser stability and lifetime

Method used

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  • Distributed feedback laser containing silver sulfide quantum dots and preparation method thereof
  • Distributed feedback laser containing silver sulfide quantum dots and preparation method thereof

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Embodiment Construction

[0021] The present invention will be further explained below in conjunction with the accompanying drawings.

[0022] Such as figure 2 As shown, the distributed feedback laser containing silver sulfide quantum dots of the present invention includes a quartz substrate 2 arranged upwards in sequence, and a silicon dioxide periodic grating 3 containing silver sulfide quantum dots.

[0023] The silicon dioxide periodic grating 3 containing silver sulfide quantum dots is composed of a silicon dioxide periodic grating and silver sulfide quantum dots 1 embedded in the silicon dioxide periodic grating. The silver sulfide quantum dots 1 are evenly distributed in the silicon dioxide periodic grating. Silver sulfide quantum dots 1 as figure 1 shown. The silver sulfide quantum dot 1 is an optical gain medium, and the silver sulfide quantum dot 1 with only double spin degeneracy in the lowest quantum state with low toxicity can realize near-infrared light gain with a low threshold. The...

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Abstract

The invention discloses a distributed feedback laser containing silver sulfide quantum dots and a preparation method thereof, wherein the distribution feedback laser comprises a quartz substrate and asilicon dioxide periodic grating containing silver sulfide quantum dots, wherein the quartz substrate and the silicon dioxide periodic grating are sequentially arranged in an upward mode. According to the laser, the low-toxicity lowest quantum state 2 degenerate silver sulfide quantum dots are adopted to replace lowest quantum state 8 degenerate lead salt quantum dots, so that the near-infrared light gain of the low-threshold value is achieved. The photo-thermal stability of the silicon dioxide is far higher than that of the organic polymer, and the periodic grating is prepared by using the silicon dioxide thin film containing silver sulfide quantum dots, so that the near-infrared quantum dot laser with low threshold value, high stability and environment-friendly distribution can be obtained.

Description

technical field [0001] The invention relates to a distributed feedback laser containing silver sulfide 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 comm...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/125H01S5/34
CPCH01S5/125H01S5/3412
Inventor 廖晨
Owner NANJING UNIV OF POSTS & TELECOMM
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