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Terahertz band-pass filter structure unit and continuous modulation method

A band-pass filter and structural unit technology, which is applied in the field of terahertz communication, can solve the problems of low response peak quality factor, single response frequency, and difficulty in dynamic continuous control of response frequency, so as to improve the quality factor and realize continuous adjustable Effect

Inactive Publication Date: 2021-06-04
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The response frequency of a single planar metal metamaterial is single, and the response peak quality factor is low, which is not suitable for the development and application of future terahertz devices.
At the same time, the structure of the terahertz bandpass filter fabricated by the planar metal array metamaterial is fixed, and the dynamic regulation of the frequency cannot be realized.
Since the response frequency of terahertz metamaterials is strongly restricted by the size of the unit structure, it is very difficult to dynamically and continuously adjust the response frequency of a terahertz bandpass filter based on fixed structural units.

Method used

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  • Terahertz band-pass filter structure unit and continuous modulation method
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  • Terahertz band-pass filter structure unit and continuous modulation method

Examples

Experimental program
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Effect test

Embodiment approach 1

[0037] refer to figure 1 and figure 2 , a terahertz bandpass filter structural unit, including an upper metal 1, a dielectric layer 2 and a lower metal 3, the upper metal 1, the dielectric layer 2 and the lower metal 3 are stacked in sequence, the upper metal 1, the dielectric layer 2 and the lower metal The central points of 3 are all located on the same axis, the lower metal 3 is provided with a hollow hole 31, the upper metal 1 is located in the hollow 31, and the upper metal 1 and the lower metal 3 form a complementary structure.

[0038]Due to the fixed structure of the terahertz response filter prepared by using planar metal array metamaterials, the dynamic regulation of the frequency cannot be realized, and the response frequency of the terahertz metamaterial is strongly restricted by the size of the unit structure. The terahertz metamaterial filter based on the fixed structural unit , it is very difficult to realize the dynamic and continuous control of the response ...

Embodiment approach 2

[0051] The difference from Embodiment 1 is that in this embodiment, the thickness of the upper metal 1 and the lower metal 3 are 20 nanometers, and the thickness of the dielectric layer 2 is 6 microns. see Figure 7 As shown, the upper metal 1 and the lower metal 3 are both square.

[0052] Other structures are the same as those in Embodiment 1, and will not be repeated here.

Embodiment approach 3

[0054] The difference from Embodiment 1 is that the materials of the upper metal 1 and the lower metal 3 in this embodiment are the same, the upper metal 1 and the lower metal 3 are gold, silver, aluminum, copper or iron, and the dielectric layer 2 is aluminum oxide, hafnium oxide or silicon carbide. The materials of the upper metal 1 and the lower metal 3 may be the same or different.

[0055] Other structures are the same as those in Embodiment 1, and will not be repeated here.

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Abstract

The invention belongs to the technical field of terahertz communication, and particularly relates to a terahertz band-pass filter structure unit which comprises an upper layer metal (1), a dielectric layer (2) and a lower layer metal (3) which are sequentially arranged in a stacked mode. The central points of the upper-layer metal (1), the dielectric layer (2) and the lower-layer metal (3) are located on the same axis, the lower-layer metal (3) is provided with a hollow hole (31), the upper-layer metal (1) is located right above the hollow hole (31), the upper-layer metal (1) and the lower-layer metal (3) form a complementary structure, structural units are periodically arranged and unfolded in a plane, and the terahertz band-pass filter is formed. According to the invention, the response frequency of the modulator is adjusted by using the change of the deflection angle between the complementary structures, and the continuous adjustment of the frequency is realized. In addition, the invention also discloses a continuous modulation method.

Description

technical field [0001] The invention belongs to the technical field of terahertz communication, and in particular relates to a terahertz bandpass filter structural unit and a continuous modulation method. Background technique [0002] Terahertz waves are electromagnetic waves with wavelengths between infrared and millimeter waves, and frequencies ranging from 0.1 THz to 10 THz. Terahertz wave has the characteristics of low photon energy, strong penetrability, and obvious characteristic absorption peaks for biological macromolecules. It has great applications in biological nondestructive testing, ultra-fast communication systems, dangerous goods inspection, and biological macromolecular spectroscopy prospect. However, the lack of natural materials that directly respond to the terahertz band in nature greatly limits the development of terahertz technology. A metamaterial is an artificially designed electromagnetic material with a periodic subwavelength unit structure, which ...

Claims

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Application Information

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IPC IPC(8): H01Q15/00H01P1/20
CPCH01Q15/0086H01P1/20
Inventor 马雷杨栋勋李睿
Owner TIANJIN UNIV
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