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Organic solid laser based on gold and silver core-shell nanorod-metal film and preparation method

A gold-silver core-shell and organic solid technology, applied in the field of lasers, can solve problems such as dye molecule quenching, achieve strong plasma absorption, increase excitation rate and quantum efficiency, and increase pump optical density

Active Publication Date: 2020-06-30
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main obstacle is the quenching of the dye molecules by the interaction of the excited species in the gain medium with the metal electrode

Method used

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  • Organic solid laser based on gold and silver core-shell nanorod-metal film and preparation method
  • Organic solid laser based on gold and silver core-shell nanorod-metal film and preparation method
  • Organic solid laser based on gold and silver core-shell nanorod-metal film and preparation method

Examples

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Embodiment 1

[0032] In this embodiment, an organic solid-state laser based on a gold-silver core-shell nanorod-metal film, specifically as figure 1 As shown, it includes a substrate 1, a metal thin film layer 2, a first isolation medium layer 3, a gold-silver core-shell nanorod structure layer 4, a second isolation medium layer 5, and a gain medium layer 6 that are sequentially stacked; the metal thin film layer 2 It is a silver thin film layer capable of producing non-localized surface plasmon effect SPP, with a thickness of 50nm; the material of the first isolation dielectric layer 3 is SiO 2 , with a thickness of 10nm; the shell material in the gold-silver core-shell nanorod structure layer 4 is Ag, and the thicknesses of the side and end faces wrapped in gold nanorods are 8nm and 4nm respectively, the central core material is 50nm in length, and the aspect ratio 3 Au nanorods; the material of the second isolation medium layer 5 is LiF, with a thickness of 10nm; the material of the gain...

Embodiment 2

[0041] In this embodiment, an organic solid-state laser based on a gold-silver core-shell nanorod-metal film, specifically as figure 2 As shown, the specific structure of the device is the same as in Embodiment 1, the only difference is that the material of the gain medium layer 6 is made of polystyrene PS, Alq 3 Composed of DCJTB with a mass ratio of 200:100:3.5, and second metal nanoparticles 7 are randomly distributed in the gain medium layer 6, and these second metal nanoparticles 7 are silver that can realize the localized surface plasmon effect LSPR nanospheres, the silver nanospheres have a diameter of 50 nm, and the doping concentration of the second metal nanoparticles 7 in the gain medium layer 6 is 4.55×10 -4 g / cm 3 , the thickness of the gain medium layer 6 is 300 nm.

[0042] The specific device structure is expressed as follows: glass / Ag film (50nm) / SiO 2 (10nm) / Au@Ag NRs / LiF(10nm) / PS:Alq 3 : DCJTB mingled with Ag nanospheres (300nm).

[0043] The method fo...

Embodiment 3

[0047] This embodiment is an organic solid-state laser based on a gold-silver core-shell nanorod-metal thin film. The specific structure of the device is the same as that of Embodiment 2, the only difference being that the silver thin film layer with a thickness of 50 nm is replaced by a gold layer with a thickness of 50 nm. film layer.

[0048] The specific device structure is expressed as follows: glass / Au film(50nm) / SiO 2 (10nm) / Au@Ag NRs / LiF(10nm) / PS:Alq 3 : DCJTB mingled with Ag nanospheres (300nm).

[0049] The above-mentioned organic solid-state laser based on gold-silver core-shell nanorods-metal film is the same as the method provided in Example 2, the only difference is that the gold film needs to be deposited on the substrate by magnetron sputtering, which is not described here. Give specific descriptions one by one.

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Abstract

The invention discloses an organic solid laser based on a gold-silver core-shell nanorod-metal film. The organic solid laser comprises a substrate, a metal film layer, a gold-silver core-shell nanorodstructure layer and a gain dielectric layer which are sequentially stacked, wherein the metal film layer is a metal film capable of generating a non-local surface plasma effect SPP; a shell layer material in the gold-silver core-shell nanorod structure layer is Ag, and a central core material is Au nanorods. According to the invention, the gold-silver core-shell nanorods are deposited on the metal film layer at a proper distance to form a composite structure of the gold-silver core-shell nanorods and the metal film layer; and random laser is enhanced by utilizing a strong local field and a scattering effect generated by coupling of the LSPR of the gold-silver core-shell nanorod and the SPP of the metal film in the composite structure, so that the laser threshold of the organic solid laseris remarkably reduced.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to an organic solid-state laser based on a gold-silver core-shell nanorod-metal thin film and a preparation method thereof. Background technique [0002] Organic semiconductor lasers have good application prospects in military, medical and other fields because of their unique advantages such as wide spectral emission range, easy processing, and low cost of organic materials. However, so far, optically pumped lasers have been realized, while electrically pumped Organic polymer lasers have not yet been realized. The main obstacle is the quenching of the dye molecules by the interaction of the excited species in the gain medium with the metal electrode. [0003] In order to reduce the negative effect of the metal film and reduce the laser threshold, people have done a lot of work, such as using distributed feedback, introducing high polymers such as polystyrene, reducing the contact ar...

Claims

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Application Information

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IPC IPC(8): H01S3/09H01S3/0955H01S3/16C23C14/06C23C14/10C23C14/18C23C14/24C23C14/35
CPCC23C14/0694C23C14/10C23C14/18C23C14/185C23C14/24C23C14/35H01S3/09H01S3/0955H01S3/1613
Inventor 宁舒雅吴元张那明代康张一凡
Owner SHAANXI UNIV OF SCI & TECH
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