A method for improving the performance of infrared and terahertz chips and infrared and terahertz chips

A chip performance, terahertz technology, applied in the direction of climate sustainability, nanotechnology for materials and surface science, sustainable manufacturing/processing, etc., can solve the performance limitations of terahertz modulators, detection speed and other performance limitations, Affect the overall performance of the terahertz system and other issues to achieve excellent localized surface plasmon resonance, controllable geometric dimensions, and high yield

Active Publication Date: 2022-04-12
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing terahertz modulators, such as: terahertz modulators based on semiconductors, graphene, metamaterials, superconductors, and vanadium dioxide, have relatively fixed properties of the materials themselves, resulting in limited performance of related terahertz modulators
Terahertz detectors also face similar development bottlenecks, and their performance such as detection speed is limited, thus affecting the overall performance of the terahertz system

Method used

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  • A method for improving the performance of infrared and terahertz chips and infrared and terahertz chips
  • A method for improving the performance of infrared and terahertz chips and infrared and terahertz chips
  • A method for improving the performance of infrared and terahertz chips and infrared and terahertz chips

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preparation example Construction

[0028] Such as figure 1 As shown, in step S1, the core-shell silver nanoparticles are subjected to the core structure precursor at a temperature of 100-170°C at least once in a reaction medium with a boiling point of 100-170°C in the presence of a protective agent Nano seed particles with core structure are obtained by reduction treatment; and at a reaction temperature of 25-100° C., shell structure precursors are added and at least one reduction treatment is performed to grow shell structures on the nano seed particles with core structure. The preparation method of the core-shell silver nanoparticles comprises:

[0029] (1) Synthesis of core-shell silver nanoparticles by chemical reduction method. First, weigh the precursor of the core structure (0.01-0.3 mg) and the reaction medium (10-40 mL), and mix them to obtain a mixed solution. Weigh an appropriate amount of protective agent and reducing agent and add to the above mixed solution to obtain a reaction solution. Stir th...

Embodiment 1

[0042] (1) Weigh silver nitrate (0.17g) and ethylene glycol (10mL) and mix them in a three-neck round bottom flask (capacity is 50mL), weigh polyvinylpyrrolidone (0.58g), fully dissolve in ethylene glycol (10mL ), inject it into the mixed solution of silver nitrate and ethylene glycol. The mixed solution was placed in an oil bath of a constant temperature magnetic stirrer, the temperature was set at 100° C., and the rotation speed was set at 800 rpm, and kept under these conditions for 30 minutes until the reaction was completed.

[0043] (2) After the reaction was completed, the mixture was cooled down to room temperature, and a certain amount of absolute ethanol was added to the obtained product, and the supernatant was removed after centrifugation (centrifugation conditions: 10000 rpm, 20 min), and the precipitate was washed with ethanol. After repeating the centrifugal washing process 2-3 times, the product was redispersed in deionized water. Obtain monodisperse silver na...

Embodiment 2

[0051] (1) Weigh silver nitrate (0.012g) and deionized water (20mL) and mix them in a three-neck round bottom flask (capacity is 100mL), and add trisodium citrate (5mmol), tannic acid (1mmol) and Deionized water (30 mL). Place the flask in an oil bath of a constant temperature magnetic stirrer, set the rotation speed to 500rpm, set the temperature to 130°C, heat until the mixed solution boils and keep it for 20-30min.

[0052] (2) Take 10 mL of sample from the reactant of step (1), and then add deionized water (5 mL) to the reactant. Then 2-3 mL trisodium citrate (2.5 mM), 2-3 mL tannic acid (0.625 mM) and 1-2 mL silver nitrate (6.25 mM) aqueous solution were added again. Continue to keep boiling and react for 20-30min. Repeat this step 2 to 10 times respectively to obtain silver nanoparticles with required particle size.

[0053] (3) 3 mL of the prepared silver nanoparticle solution was added to a mixture of 1.5 mL of absolute ethanol, 1 mL of ammonium hydroxide and deioni...

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Abstract

The invention provides a method for improving the performance of infrared and terahertz chips and the infrared and terahertz chips. The method for improving the performance of infrared and terahertz chips includes the following steps: providing a core-shell silver nanoparticle; disposing the core-shell silver nanoparticle on the infrared and terahertz chip; wherein, the core-shell silver nanoparticle In a reaction medium with a boiling point of 100-170°C, in the presence of a protective agent, the precursor of the core structure is reduced at least once at a temperature of 100-170°C to obtain nano-seed particles of the core structure; and at 25-100°C At a reaction temperature of ℃, it is obtained by adding a shell-structured precursor and performing at least one reduction treatment. The infrared and terahertz chip obtained based on the manufacturing method of the invention has high modulation depth, response speed and wide working bandwidth, thereby ensuring ideal performance of the terahertz system.

Description

technical field [0001] The invention relates to the field of photoelectric technology, in particular to a method for improving the performance of infrared and terahertz chips and the infrared and terahertz chips. Background technique [0002] Terahertz wave is a kind of electromagnetic wave, its frequency range is generally between 0.1-10THz, and the corresponding wavelength is 3mm-30μm. Due to the special position of terahertz wave in the electromagnetic spectrum, it has many similar characteristics with its adjacent bands, so its long-wave band is generally used in the field of traditional electronics, while the short-wave direction is used in the field of optics. In recent years, the rapid development of the research and application of terahertz technology has made terahertz waves widely used in many fields such as imaging, communication, medicine, biological science and national defense. However, the technology of detection, modulation and generation of terahertz waves ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/18B22F9/24B22F1/054B82Y30/00B82Y40/00
CPCH01L31/18B22F9/24B82Y30/00B82Y40/00B22F1/07B22F1/054Y02P70/50
Inventor 赖伟恩方红云袁浩
Owner HEFEI UNIV OF TECH
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