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Terahertz metamaterial beam splitter

A beamsplitter and metamaterial technology, applied in the field of terahertz beamsplitters, can solve the problems of limiting the application of terahertz beamsplitters, insufficient changes in the wave number and direction of the outgoing wave, etc.

Active Publication Date: 2019-08-30
CHONGQING UNIV OF POSTS & TELECOMM
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  • Abstract
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Problems solved by technology

[0004] At present, terahertz metamaterial beam splitters at home and abroad are not enough to change the wave number and direction of the outgoing wave, which limits the application of terahertz beam splitters

Method used

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  • Terahertz metamaterial beam splitter
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  • Terahertz metamaterial beam splitter

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Embodiment Construction

[0021] The technical solutions in the embodiments of the present invention will be described clearly and in detail below with reference to the drawings in the embodiments of the present invention. The described embodiments are only some of the embodiments of the invention.

[0022] The technical scheme that the present invention solves the problems of the technologies described above is:

[0023] The terahertz metamaterial beam splitter of the present invention is as figure 2 As shown, the beam splitter includes a dielectric layer and metamaterials of subwavelength metal arrays attached above and below the dielectric layer, and the array of subwavelength metal layers includes four structural units with different stripe directions, each of which is The top metal strip unit such as figure 1 As shown, a 4×4 phase gradient metasurface is designed based on the unit structure, and the beam splitting of the reflective terahertz beam splitter is constructed. In the 0.22-0.30THz fr...

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Abstract

The invention relates to a terahertz metamaterial beam splitter. The unit structure of the terahertz metamaterial beam splitter is composed of a top metal strip, an intermediate dielectric layer and abottom metal plate. Four units with the rotation stepping being 45 degrees are periodically arranged to form a 4*4 phase gradient metasurface. When terahertz waves vertically enter the array surface,the electromagnetic waves are reflected into four beams of waves which are equal in energy but different in propagation direction, and the reflection angles at different frequency points are different. The beam splitter has the advantages of small volume and low cost, and can be applied to the aspects such as terahertz stealth and terahertz imaging.

Description

technical field [0001] The invention belongs to a terahertz beam splitter technology, in particular to a metamaterial-based beam splitter. Background technique [0002] The application of terahertz waves in high-speed communication, radar and imaging has attracted the attention of researchers at home and abroad, among which the effective control of terahertz beam splitting is one of the research hotspots of terahertz science and technology. Traditionally, the phase accumulation method is mainly used to regulate the terahertz wave, but the operation of this method is relatively complicated. In recent years, a large number of scholars have used metamaterials to build terahertz devices, making it easier and more efficient to manipulate terahertz waves. As a two-dimensional pattern of metamaterials, metasurfaces have wider application prospects in realizing terahertz wave polarization conversion, polarization maintenance, and beam separation. [0003] The metamaterial-based te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/14
CPCH01Q15/14
Inventor 潘武王泶尹陈琦任信毓
Owner CHONGQING UNIV OF POSTS & TELECOMM
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