Terahertz modulation material with gradient modulation amplitude and preparation method thereof

Abstract

The invention provides a terahertz modulation material with a gradient modulation amplitude and a preparation method thereof. The preparation method comprises the steps of: carrying out mixing and internal mixing treatment on high-conductivity metal micro-nano powder and low-viscosity polymer powder, and then carrying out crushing treatment to obtain metal / low-viscosity polymer composite powder; and mixing the metal / low-viscosity polymer composite powder with high-viscosity polymer superfine powder for thermoplastic processing, and then carrying out thermocuring molding under the placement condition that a mold has a certain inclination length and inclination angle, so as to obtain the terahertz modulation material with the gradient modulation amplitude. According to the terahertz modulation material, through the gradient distribution density of the metal micro-nano powder in the preparation process, terahertz modulation intensity in gradient distribution is achieved on the same material, terahertz modulation sites with the needed fixed intensity can be obtained through testing in the later period, the terahertz modulation function is achieved, meanwhile, the method has the characteristics of simplicity in operation and lower cost, and the prepared terahertz modulation material can achieve terahertz wave modulation with the 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...

AI Technical Summary

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

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