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Plasma excimer and exciton structure and preparation method and purpose thereof

A technology of excitonic structure and plasma, which is applied in the field of condensed matter physics and quantum optics, can solve the problems of limited coupling strength and low overlapping volume, and achieve the effects of strong coupling, good reaction repeatability and mild reaction conditions

Active Publication Date: 2018-07-24
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this study, due to the localization of the plasmonic field of the gold rod itself, its overlapping volume is low, which limits the coupling strength generated by its hybrid structure.

Method used

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  • Plasma excimer and exciton structure and preparation method and purpose thereof
  • Plasma excimer and exciton structure and preparation method and purpose thereof
  • Plasma excimer and exciton structure and preparation method and purpose thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] This embodiment provides a method for preparing a plasmon exciton structure, and the specific method is:

[0107] 1. Synthesis of gold nanorings

[0108] a) Synthesis of silver species.

[0109] Take 3 250mL beakers, add 200mL deionized water to each, and put them in a magnetic bar to stir. Add 10mL of 0.07mol / L sodium citrate (Sodium citrate), 200μL of 0.1mol / L silver nitrate, 450μL of 25wt% hydrogen peroxide solution, and quickly add 1mL after stirring evenly. 0.05mol / L freshly prepared sodium borohydride solution, stirring for 5 minutes, stop, take out the magnet with a magnet, seal it with a sealing film inserted with an exhaust hole, and store it in a refrigerator at 4°C for 2 hours. After that, the solution in the beaker was divided into 50 mL centrifuge tubes, 35 mL per tube. Centrifuge at 11000 rpm for 20 minutes in a tabletop high-speed centrifuge, discard the supernatant, and obtain the solid silver.

[0110] b) Growth of silver plate

[0111] Take 3 100mL beakers, ...

Embodiment 2

[0135] This embodiment provides a method for preparing a plasmon exciton structure, and the specific method is:

[0136] 1. Synthesis of gold nanorings

[0137] a) Synthesis of silver species.

[0138] Take 3 250mL beakers, add 220mL deionized water to each, and put them in a magnetic bar to stir. Add 15mL of 0.08mol / L sodium citrate, 240μL of silver nitrate with a concentration of 0.15mol / L, 500μL of 30wt% hydrogen peroxide solution, and quickly add 1.2mL after stirring. It is a freshly prepared sodium borohydride solution of 0.15 mol / L. After stirring for 7 minutes, stop. Take out the magnet with a magnet, seal it with a sealing film inserted with an exhaust hole, and store it in a refrigerator at 4°C for 2.5 hours. After that, the solution in the beaker was divided into 50 mL centrifuge tubes, 35 mL per tube. Centrifuge at 12000 rpm for 30 minutes in a tabletop high-speed centrifuge, discard the supernatant, and obtain the solid silver.

[0139] b) Growth of silver plate

[0140]...

Embodiment 3

[0165] This embodiment provides a method for preparing a plasmon exciton structure, and the specific method is:

[0166] In this example, gold nanorings were prepared according to the method of Example 1.

[0167] (1) Preparation of silver nanolayers on gold nanorings

[0168] First, determine the concentration of the gold nanoring dispersion by ultraviolet-visible absorption spectroscopy, and then dilute it to a concentration of 4.5×10 -10 mol / L aqueous solution, take 110 μL of gold nanoring aqueous solution and pour it into a 1.5 mL small centrifuge tube. Add 17μL of cetylpyridinium chloride monohydrate (CPC) with a concentration of 0.12mol / L to it, shake and mix with a vortex mixer, and then add 0.011mol / L to a small centrifuge tube Silver nitrate (Silver nitrate) 15μL, shake and mix again with a vortex mixer, and finally add 7μL of ascorbic acid (L-Ascorbic acid) at a concentration of 0.13mol / L, shake and mix with a vortex mixer, and place in a 75℃ metal bath Medium heating for...

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Abstract

The invention provides a plasma excimer and exciton structure and a preparation method and purpose thereof. The plasma excimer and exciton structure comprises metal nanoparticles and a dye layer adsorbed on the metal nanoparticles, and the metal nanoparticles include annular and / or disc-shaped metal nanoparticles. The preparation method comprises that the metal nanoparticles are mixed with a dye solution, and kept standing away from light, solid is separated from liquid, and the obtained solid is the plasma excimer and exciton structure. The provided plasma excimer and exciton structure can beused for manual light harvesting, threshold-free laser or quantum information processing. The plasma excimer and exciton structure is wide in the plasma field distribution range and has a strong coupling effect; and the preparation method is mild in condition, simple in operation, high in repeatability, capable of realizing large-scale production and free of pollution.

Description

Technical field [0001] The invention belongs to the field of condensed matter physics and quantum optics, and relates to a plasmon exciton structure and a preparation method and application thereof. Background technique [0002] Plasmon resonance excimer refers to the collective vibration of electrons exhibited by precious metal nanoparticles after they are exposed to light. It can be regarded as an optical cavity that traps photons. When the excitons are strongly coupled with the plasmon resonance excitons, the energy of the excitons absorbed by the photons will not be consumed immediately, but will relax and oscillate between the optical cavity and the excitons, resulting in two excited states in the mixed state. energy level. Therefore, the absorption peak corresponding to the absorption spectrum of the mixed system is split. This physical phenomenon is called Rabi splitting. [0003] The hybrid structure of plasmon exciton can be regarded as the state of photon and quantum en...

Claims

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Application Information

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IPC IPC(8): G02B5/00B22F9/24B22F1/02B22F1/00B82Y30/00B82Y40/00
CPCG02B5/008B82Y30/00B82Y40/00B22F9/24B22F1/102B22F1/17
Inventor 李娜丁宝全韩梓弘刘清徐雪卉湛鹏飞
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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