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A broadband surface plasmon radiator

A surface plasmon and radiator technology, applied in solid-state lasers and other directions, can solve the problems of no direct radiation of surface plasmons, inability to carry out miniaturization applications, and low degree of device integration, and achieve maximum power transmission. Simple design, small size effect

Active Publication Date: 2018-03-20
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the field of directly radiating surface plasmons into space waves is still relatively blank.
One of the existing radiation structures is to use the surface plasmon waveguide as the excitation, and use the metal patch for secondary radiation, which does not realize the direct radiation of the surface plasmon, and the structure is complex, and the integration degree of the device is low ; the other is to radiate surface plasmons by using a metasurface with a graded refractive index. Although this method has achieved direct radiation to surface plasmons, this method of using a metasurface will increase the overall The size of the structure makes it impossible to miniaturize the application

Method used

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  • A broadband surface plasmon radiator
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Embodiment Construction

[0015] Below in conjunction with embodiment the present invention will be further described.

[0016] figure 1 The broadband surface plasmon radiator in (a) adopts a double-faced metal structure, including: a dielectric substrate 3 and an upper layer metal strip 1 and a lower layer metal strip 2 attached to and placed opposite to it, and the upper layer metal Both strip 1 and the lower metal strip 2 are provided with three sections of unilateral folded strip lines. For the convenience of description, along the extending direction of the metal strip, namely figure 1 In the direction from left to right, they are successively named as the first unilateral fold line, the second unilateral fold line, and the third unilateral fold line, such as figure 1 (b) and figure 1 As shown in (c), the three unilateral folded belt lines are provided with equally spaced and equal-width grooves, the groove width is 1.2mm, and the groove interval is 2.5mm. The grooves on the second unilateral fo...

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Abstract

The invention discloses a broadband surface Plasmon radiator. The broadband surface Plasmon radiator operates at the microwave frequency band and uses dual-surface antipodal metallic structure, namely dielectric upper-level metal and lower-level metal use same structure and are arranged oppositely. The broadband surface Plasmon radiator performs feed through a conventional microstrip transmission line, achieves radiation of surface Plasmon by using a single-side fold belt line with a gradually-changed groove depth and an opening metallic structure, and solves a problem that a radiator in the prior art is large in overall size and cannot be miniaturized. The broadband surface Plasmon radiator may achieve direct and high-efficient radiating surface Plasmon within a broadband range.

Description

technical field [0001] The invention relates to the field of novel artificial electromagnetic media and electronic devices of wireless communication systems, in particular to a broadband surface plasmon radiator. Background technique [0002] A surface plasmon is a surface wave that propagates at the interface between a metal and a dielectric while decaying exponentially in the direction perpendicular to the interface. When a light wave (electromagnetic wave) is incident on the interface between the metal and the medium, the free electrons on the metal surface will oscillate collectively, thus forming a near-field electromagnetic wave that propagates along the metal surface. Resonance occurs when electrons oscillate at the same frequency as the incoming light wave. In the resonance state, the energy of the incident wave is effectively transformed into the collective vibration energy of the free electrons on the metal surface, forming a special electromagnetic mode: the elec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S1/02
Inventor 崔铁军尹佳媛张浩驰
Owner SOUTHEAST UNIV
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