Ultra wide band terahertz class surface plasmon coupler and coupling method

A surface plasmon and coupler technology, applied in electrical components, waveguide devices, circuits, etc., can solve the problems of low coupling efficiency and limited coupling bandwidth, so as to improve conversion efficiency, reduce electromagnetic energy loss, and widen excitation bandwidth. Effect

Inactive Publication Date: 2016-06-22
PEKING UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The problem is that the coupling efficiency of these coupling methods is relatively low, and the coupling bandwidth is relatively limited

Method used

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  • Ultra wide band terahertz class surface plasmon coupler and coupling method
  • Ultra wide band terahertz class surface plasmon coupler and coupling method
  • Ultra wide band terahertz class surface plasmon coupler and coupling method

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Embodiment Construction

[0028] The present invention will be further described through the embodiments below in conjunction with the accompanying drawings.

[0029]As shown in Figure 1, the ultra-broadband terahertz surface plasmon coupler includes: TEM mode compressor 1, mode matcher 2 and surface mode radiator 3, which are sequentially connected as a whole along the propagation direction of the transverse electromagnetic wave TEM , the outer layer is the outer sleeve; the middle of the outer sleeve has a through hole; the through hole includes three parts connected as one along the propagation direction: the first through hole 11, the second through hole 21 and the third through hole 31; the first through hole The diameter of the through hole gradually decreases along the propagation direction, and a cylindrical metal inner core 12 is arranged inside to form a TEM mode compressor 1; the diameter of the second through hole 21 is constant along the propagation direction, and a metal wrinkle with groov...

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Abstract

The invention discloses an ultra wide band terahertz class surface plasmon coupler and a coupling method. In the invention, a TEM mode compressor, a mode matcher and a surface mode radiator are adopted. Parameters of the above three portions are reasonably selected. Conversion efficiency from a TEM mode to a class surface plasmon mode is greatly increased and simultaneously an excitation band width of the class surface plasmon mode is widened. The coupler and the coupling method play a powerful role in promoting practical application of a class surface plasmon waveguide which is a novel waveguide in a terahertz wave band. The coupler of the invention is a whole metal structure so that electromagnetic energy losses introduced by the coupler are reduced. Simultaneously, processing of the coupler is convenient and integration is easy to achieve.

Description

technical field [0001] The invention relates to the field of terahertz passive devices, in particular to an ultra-wideband terahertz surface plasmon coupler and a coupling method. Background technique [0002] The terahertz (THz) spectrum ranges from 0.1THz to 10THz. Due to its abundant available spectrum resources and the unique characteristics of terahertz waves, terahertz technology has developed rapidly in recent years. Among them, the most typical applications include terahertz communication and terahertz imaging. Terahertz waveguide devices play an indispensable role in these applications. However, the size and frequency of traditional rectangular waveguides, circular waveguides, and coaxial lines are compatible, and their performance parameters are greatly affected by machining accuracy. The latest research has found that surface waves generated based on surface plasmons can also conduct energy in the terahertz band. The so-called surface plasmon-like means that wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P5/08
CPCH01P5/08
Inventor 汤恒河刘濮鲲
Owner PEKING UNIV
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