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Perovskite nano-structure plasma laser

A plasmonic and perovskite technology, applied in the field of micro-nano photons and lasers, can solve the problems of low quantum efficiency of semiconducting gain media, lack of cavity feedback in lasers, high Auger loss, etc., and achieve high Auger loss and low cavity feedback , the effect of low threshold

Active Publication Date: 2016-11-16
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the field strength effect can be improved by using the air gap, the laser also lacks effective cavity feedback and has the problems of low quantum efficiency of the semiconducting gain medium and high Auger loss, so a higher energy pump laser or low temperature ( Working under liquid nitrogen cooling)

Method used

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Examples

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Embodiment 1

[0015] Silver with a thickness of 100 nanometers was evaporated on a silicon substrate with a flat surface, and then silicon dioxide with a thickness of 5 nanometers was evaporated on the silver surface to form a silver / silicon dioxide composite film; lead iodide perovskite nanosheets were made CH 3 NH 3 PbI 3 , where the lead iodide perovskite nanosheet is 150 nm thick, the cross-sectional shape is a regular hexagon, and the side length of the regular hexagon is 32 μm, and then the lead iodide perovskite nanosheet is moved to the silver / silicon dioxide On the composite film, a silver / silicon dioxide / lead iodide perovskite nanosheet structure is formed. In this structure, the refractive index of silver is 0.14+5.14i, the thickness of silver is 100 nanometers, and the refractive index of silica is 1.45 , the thickness is 5 nm, the refractive index of lead iodide perovskite nanosheets is 2.54+0.03i, the thickness is 150 nm, the cross-sectional shape is regular hexagon, and the...

Embodiment 2

[0017] Silver with a thickness of 100 nanometers was evaporated on a silicon substrate with a flat surface, and then silicon dioxide with a thickness of 10 nanometers was evaporated on the silver surface to form a silver / silicon dioxide composite film; make lead bromide perovskite nanosheets CH 3 NH 3 PbBr 3 , where the lead bromide perovskite nanosheet is 50 nm thick, the cross-sectional shape is a regular hexagon, and the side length of the regular hexagon is 32 μm, and then the lead bromide perovskite nanosheet is moved to the silver / silicon dioxide On the composite film, a silver / silicon dioxide / lead bromide perovskite nanosheet structure is formed. In this structure, the refractive index of silver is 0.14+5.14i, the thickness of silver is 100 nanometers, and the refractive index of silica is 1.45 , the thickness is 10 nm, the refractive index of lead bromide perovskite nanosheets is 2.86+0.04i, the thickness is 50 nm, the cross-sectional shape is regular hexagon, and th...

Embodiment 3

[0019] Aluminum with a thickness of 100 nanometers was evaporated on a flat surface sapphire, and then magnesium fluoride with a thickness of 8 nanometers was evaporated on the silver surface to form an aluminum / magnesium fluoride composite film; lead chloride perovskite nanosheets CH were fabricated 3 NH 3 PbCl 3 , where the lead chloride perovskite nanosheet is 200 nm thick, the cross-sectional shape is a regular triangle, and the side length of the regular triangle is 48 μm, and then the lead bromide perovskite nanosheet is moved to the aluminum / magnesium fluoride On the composite film, an aluminum / magnesium fluoride / lead chloride perovskite nanosheet structure is formed. In this structure, the refractive index of aluminum is 1.48+3.14i, and the thickness is 100 nanometers. The refractive index of magnesium fluoride is 1.38 and the thickness is 100 nm. It is 8 nanometers, the refractive index of lead chloride perovskite nanosheets is 3.06+0.04i, the thickness is 200 nanome...

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Abstract

The invention belongs to the technical field of micro-nano photons and laser, and particularly relates to a perovskite nano-structure plasma laser. A lead halide perovskite plasma laser comprises a lead halide perovskite nanosheet, an insulating dielectric layer and a metal substrate; the lead halide perovskite nanosheet, which is of a regular polygon structure, is located above the metal substrate; the insulating dielectric layer is located between the lead halide perovskite nanosheet and the metal substrate; and the ratio of the refractive indexes of the insulating dielectric layer and the lead halide perovskite nanosheet is less than 0.75. The perovskite nano-structure plasma laser has the characteristics of effective cavity feedback, low threshold value and adjustable wavelength.

Description

technical field [0001] The invention belongs to the field of micro-nano photonics and laser technology, and particularly relates to a perovskite nano-structure plasma laser. Background technique [0002] Over the past few decades, laser science has achieved great success in making taller, faster, and smaller coherent light sources. Similar to electronic devices, the miniaturization and integration of photonic devices have broad application prospects. Ultra-small lasers can be used in chemical and biomedical engineering fields, such as high-sensitivity detection of chemical substances, high-sensitivity and small-volume biosensors, microscopy, and laser surgery. In addition, ultra-small lasers also have a wide range of applications in all-optical computing, optical storage, and nano-analysis. [0003] Laser resonators based on traditional dielectric materials are limited by the diffraction limit, and their spot size cannot be smaller than half the wavelength of light. This ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/20H01S5/30
CPCH01S5/20H01S5/30
Inventor 李国辉崔艳霞纪兴启
Owner TAIYUAN UNIV OF TECH
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