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A terahertz modulation material with gradient modulation amplitude and its preparation method

A modulation amplitude and terahertz technology, applied in the field of terahertz modulation, can solve the problems of modulation intensity deviation, high cost of exploring process conditions, large capacitance and series resistance, etc., to ensure dimensional stability, mature process methods, and prolong service life Effect

Active Publication Date: 2022-01-28
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, electronically and optically controlled terahertz intensity modulators based on semiconductors such as silicon and phase change materials such as vanadium dioxide have many disadvantages: 1. The resonant circuit of the electronically controlled terahertz intensity modulator has large capacitance and series resistance , the on-discharge requires a certain time delay, resulting in a relatively slow modulation speed of the modulator; and conductive electrodes (such as conductive silicon, etc.) are required on the upper and lower surfaces of the electronically controlled terahertz wave modulator to realize the electronically controlled modulator
[0006] However, for the terahertz intensity modulator, how to stably obtain the terahertz modulation wave with the required fixed intensity is the fundamental purpose. Although the metal / polymer-based hybrid material also has the function of terahertz modulation, the precise modulation intensity The degree and consistency performance is very poor. Even if the same process is used, the modulation intensity of metal / polymer-based modulation plates prepared in different batches will be deviated due to errors in the preparation process and natural random factors.
On the other hand, its modulation intensity usually cannot pass the test data of the prepared finished product, so that the preparation process conditions of other modulation intensities can be obtained by reverse reasoning, which makes it necessary to go through a large number of repeated Although the cost of the material itself is low, the cost of exploring the process conditions is too high, so there is no relevant report on the preparation of terahertz modulation materials using metal / polymer-based hybrid materials in the prior art

Method used

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  • A terahertz modulation material with gradient modulation amplitude and its preparation method
  • A terahertz modulation material with gradient modulation amplitude and its preparation method
  • A terahertz modulation material with gradient modulation amplitude and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0063] In this embodiment, a preparation method of a terahertz modulation material with a gradient modulation amplitude comprises the following steps in parts by weight:

[0064] (1) Grind the commercially available copper foil into a single piece of copper foil with a specification of 2cm×2cm, then put the single piece of copper foil into a high-speed pulverizer for grinding, control the temperature of the high-speed pulverizer to 10°C, and the speed to 300 rpm points, cyclically pulverized 3 times to obtain copper micro-nano powder;

[0065] (2) 100 parts of copper micro-nano powder and 20 parts of polyethylene wax powder are mixed and banburyed to obtain copper / polyethylene wax composite material; wherein, the process parameters of banburying are: banburying time 5 minutes, the rotating speed is 30 rpm, and the mixing temperature is 130°C;

[0066] (3) the copper / polyethylene wax composite material obtained in step (2) is pulverized to obtain a copper / polyethylene wax comp...

Embodiment 2

[0071] In this embodiment, a preparation method of a terahertz modulation material with a gradient modulation amplitude comprises the following steps in parts by weight:

[0072] (1) Grind the commercially available copper foil into a single piece of copper foil with a specification of 2cm×2cm, then put the single piece of copper foil into a high-speed pulverizer for grinding, control the temperature of the high-speed pulverizer to 10°C, and the speed to 300 rpm points, cyclically pulverized 3 times to obtain copper micro-nano powder;

[0073] (2) 100 parts of copper micro-nano powder and 20 parts of polyethylene wax powder are mixed and banburyed to obtain copper / polyethylene wax composite material; wherein, the process parameters of banburying are: banburying time 5 minutes, the rotating speed is 30 rpm, and the mixing temperature is 130°C;

[0074] (3) the copper / polyethylene wax composite material obtained in step (2) is pulverized to obtain a copper / polyethylene wax comp...

Embodiment 3

[0079] In this embodiment, a preparation method of a terahertz modulation material with a gradient modulation amplitude comprises the following steps in parts by weight:

[0080] (1) Grind the commercially available copper foil into a single piece of copper foil with a specification of 2cm×2cm, then put the single piece of copper foil into a high-speed pulverizer for grinding, control the temperature of the high-speed pulverizer to 10°C, and the speed to 300 rpm points, cyclically pulverized 3 times to obtain copper micro-nano powder;

[0081] (2) 100 parts of copper micro-nano powder and 20 parts of polyethylene wax powder are mixed and banburyed to obtain copper / polyethylene wax composite material; wherein, the process parameters of banburying are: banburying time 5 minutes, the rotating speed is 30 rpm, and the mixing temperature is 130°C;

[0082] (3) the copper / polyethylene wax composite material obtained in step (2) is pulverized to obtain a copper / polyethylene wax comp...

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Abstract

The invention provides a terahertz modulation material with gradient modulation amplitude and a preparation method thereof. The preparation method is obtained by mixing high-conductivity metal micro-nano powder and low-viscosity polymer powder, banburying, and then pulverizing. Metal / low-viscosity polymer composite powder, mixed with high-viscosity polymer ultra-fine powder for thermoplastic processing, and then thermally cured and molded under the condition that the mold has a certain inclination length and inclination angle, that is, it has gradient modulation Amplitude terahertz modulation materials. The terahertz modulation material achieves a gradient distribution of terahertz modulation intensity on the same material through the gradient distribution density of metal micro-nano powders during its preparation process, and the required fixed-intensity terahertz modulation sites can be obtained through testing in the later stage , which not only realizes the terahertz modulation function, but also has the characteristics of simple operation and low cost. The prepared terahertz modulation material can achieve terahertz wave modulation with an intensity amplitude of 0.2-0.8.

Description

technical field [0001] The invention belongs to the technical field of terahertz modulation, and relates to a terahertz modulation material with gradient modulation amplitude and a preparation method thereof. Background technique [0002] Terahertz waves cover a wide bandwidth from microwave to infrared spectral region (30-3000 μm), and have great application prospects in imaging, high-bandwidth communication, radar and other fields. The development of dynamic terahertz devices is the basis for applications, including switching, modulation, and phase shifting. These functions are usually achieved by doping functional materials with controllable optical or electrical parameters such as semiconductors, liquid crystals, two-dimensional materials, perovskites, and phase change materials. [0003] The terahertz intensity modulator is a key component of the terahertz signal transmission system, and its related research is of great significance to the further application of terahe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C43/02B29B7/00B29B13/10B29C43/58C08L23/06C08L91/06C08K3/08C08J5/18B22F1/054B29K23/00B29K505/10
CPCB29C43/003B29C43/02B29B7/005B29B13/10B29C43/58C08J5/18C08J2323/06C08J2423/06C08J2491/06C08K2201/001C08K2003/085C08K2003/0806B29K2023/06B29K2023/0633B29C2043/5808B29C2043/5816B29K2505/10B22F1/054B22F1/10
Inventor 李怡俊张桐瑞吴振华胡旻钟任斌刘頔威周俊刘盛纲
Owner SICHUAN UNIV
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