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L-shaped open loop resonator super-surface terahertz reflective polarized converter

Inactive Publication Date: 2018-05-15
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

The polarizer has a rotationally symmetrical structure in the horizontal direction, and can realize cross-polarization conversion of linear polarization and polarization conversion of left-handed and right-handed circularly polarized waves, but the efficiency of polarization conversion needs to be improved, and still in the lower frequency band

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  • L-shaped open loop resonator super-surface terahertz reflective polarized converter
  • L-shaped open loop resonator super-surface terahertz reflective polarized converter
  • L-shaped open loop resonator super-surface terahertz reflective polarized converter

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Embodiment Construction

[0024] The reflective polarizer of the present invention has an asymmetric structure in the vertical direction and the horizontal direction, and its working frequency band is the terahertz frequency band with high efficiency. Circular polarization realizes high-efficiency polarization conversion, and the polarization conversion efficiency is greater than 99%. The polarizer has extremely high cross-polarization conversion efficiency, and has a simple structure and low processing difficulty.

[0025] like figure 1 , 2 As shown, the present invention includes a signal input end / reflection output end 1 , a substrate dielectric substrate 3 , a top metal chiral structural unit 2 , a bottom metal layer 4 , and a signal transmission output end 5 . The L-shaped metal chiral structural unit is composed of two L-shaped metal sheets with one large and one small openings facing each other. The adjacent sides of the two L-shaped metal sheets are equal and parallel to the coordinate axes (...

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Abstract

The invention provides an L-shaped open loop resonator super-surface terahertz reflective polarized converter, and belongs to the technical field of electromagnetic wave full vector transmission regulation and control devices. The L-shaped open loop resonator super-surface terahertz reflective polarized converter comprises MxN metal chiral structure units which are arranged on the top layer and abottom metal layer, and an underlying dielectric substrate which is arranged between the metal chiral structure units and the bottom metal layer. The L-shaped open loop resonator super-surface terahertz reflective polarized converter is characterized in that the metal chiral structure units comprise first L-shaped resonance pieces and second L-shaped resonance pieces which are orthogonally arranged in a square area. The vertex of the first L-shaped resonance pieces and the vertex of the second L-shaped resonance pieces are arranged on the vertexes of the two diagonal corners of the square. Thegeometrical shape of each first L-shaped resonance piece is formed by two equal right-angled trapezoids, wherein the two right-angled trapezoids include a 45-degree base angle respectively, the beveledges are overlapped and the bottom edges are mutually perpendicular. The length of the bottom edges of the right-angled trapezoids forming the first L-shaped resonance pieces is less than the lengthof the bottom edges of the right-angled trapezoids forming the second L-shaped resonance pieces.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic wave full vector transmission control devices, and relates to a reflective terahertz linearly polarized left-handed and right-handed circular polarizer. Background technique [0002] Terahertz wave is located between microwave and infrared radiation in the electromagnetic spectrum, and its frequency range is 0.1-10THz. In recent years, with the development of the terahertz field, the external demand for terahertz wave devices is increasing. At present, based on Metamaterials for terahertz devices have attracted attention. [0003] Metamaterials are artificial electromagnetic materials composed of periodic arrangements of subwavelength unit structures. Due to their extraordinary physical properties that natural materials do not possess, they are widely used in various functional devices, such as sensors, super lenses, invisibility cloaks, etc. . So far, the development of "metamaterials" ...

Claims

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Application Information

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IPC IPC(8): H01Q15/24
CPCH01Q15/244H01Q15/248
Inventor 兰峰杨梓强史宗君罗峰
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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