Tunable-frequency Terahertz metamaterials modulator

Abstract

The utility model discloses a tunable-frequency Terahertz metamaterials modulator comprising unit devices arranged periodically. Each unit device comprises a substrate, a functional material layer and metal resonator units. The functional material layer is arranged on the substrate, and the metal resonator units are arranged on the functional material layer. When the functional material layer turns to a metal phase from an insulation phase, conductivity of the functional material layer is exponentially increased to increase areas of middle open capacitance of the metal resonator units, the resonator frequency of the metal resonator units is decreased with the increase of the capacitance, so that frequency tuning of the unit devices is realized. By the aid of the tunable-frequency Terahertz metamaterials modulator, the metal opening resonator units arranged periodically are produced on the substrate in the Terahertz wave band of low transmitting consumption, conductivity changes before and after phase changes of the metal insulation phase change materials are used to change areas of the open capacitance of the resonator units, and resonant frequency is tunable; and initiative control of electromagnetic transmission features at a particular frequency by the Terahertz wave band is realized, and large switch ratio or high-modulation depth genera is obtained.

Description

technical field [0001] The invention belongs to the field of electromagnetic functional materials, and more specifically relates to a terahertz wave metamaterial modulator with adjustable frequency. Background technique [0002] Terahertz (THz) waves are electromagnetic waves with a frequency ranging from 0.1 to 10 THz (wavelength of 3000 to 30 μm). They are located in the special position of electronics and in the transition from electronics to photonics. They have many superior characteristics. In national defense and military, Satellite communication, medical diagnosis, etc. have shown broad application potential. [0003] Metal-insulator transition (MIT) materials have the characteristics of changing the resistivity and crystal structure of the material under external field excitation conditions. It has a wide range of research and applications in the fields of optical switches and optical storage. [0004] Metamaterials (MMs) refer to a class of artificially manufactu...

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Problems solved by technology

[0006] Aiming at the defects of the prior art, the purpose of the present invention is to provide a frequency-tunable terahertz wave metamaterial modulator, aiming at solving the problem that the prior art cannot modulate the resonant frequency or modulation depth of the terahertz wave metamaterial modulator not enough problem

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