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Tunneling effect of artificial surface plasmon and working method thereof

A plasmon, artificial surface technology, applied in the field of guided wave structure, can solve the problems of long-distance transmission and high loss of curved transmission, and achieve the effect of small size, wide application and convenient integration

Inactive Publication Date: 2017-07-07
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a tunneling effect of artificial surface plasmons and its working method, so as to solve the problems of long-distance transmission and curve transmission of artificial surface plasmons in the prior art. high loss problem, the invention can significantly reduce the loss in the transmission process of artificial surface plasmons, and realize the long-distance transmission and curve transmission of artificial surface plasmons

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  • Tunneling effect of artificial surface plasmon and working method thereof
  • Tunneling effect of artificial surface plasmon and working method thereof
  • Tunneling effect of artificial surface plasmon and working method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Analysis of pristine plasmonic waveguides supporting artificial surface plasmon tunneling, such as figure 1 , figure 2 , the port size is a*b=22.86*10.16mm 2 , which is mainly composed of three parts, namely, a rectangular waveguide at both ends (area I), a transitional waveguide (area II), and a plasmonic waveguide (area III). The length of the rectangular waveguide is l 1 = a, the transition waveguide length is l 2 = 2a, the length of the plasmonic waveguide is l 3 = 3a. The structural unit of the plasmonic waveguide is as image 3 , the metal upper wall of the rectangular waveguide is cut out and connected by a metal strip. Its geometric size is mainly determined by several parameters, namely the dimensions a and b of the cross section, the width w of the slit, the period p, and the length of the metal strip. width d. Such as Figure 4a , Figure 4b , Figure 4c , Figure 4d As shown, different parameters are changed to simulate the dispersion of the struct...

Embodiment 2

[0043] Such as Figure 6a-Figure 6c As shown, the tunneling channel filled with zero effective dielectric constant material is connected to the plasmonic waveguide, and the inverted U-shaped channel, H-shaped channel, and U-shaped channel are analyzed, corresponding to Model 1 (Model1) and Model 2 (Model2) , Model 3 (Model3), the length of the tunneling channel is l 4 =4a, width is w c = a / 4, here the medium filled in the plasmonic waveguide is ε r1 = 4, the relative permittivity of the filling in the tunneling channel is ε r2 =2.4, and metal strips are periodically arranged at the interface of the two media. According to the formula It can be calculated that the frequency point where the tunneling effect occurs is about 4.24GHz. Using electromagnetic simulation software, it can be obtained that Figure 7 The transmission coefficient (S 21 ) and reflection coefficient (S 11 ), curve 1-curve 3 in the figure correspond to model 1-model 3 respectively. There are two tra...

Embodiment 3

[0045] To further verify that the tunneling effect of artificial surface plasmons is not affected by the channel geometry, as Figure 8 As shown, keep the total length of the tunneling channel l 4 Consistent with Model 3, the inverted U-shaped tunneling channel in Example 2 is bent at 90 degrees. Here, the filling in the tunneling channel is still a medium with a relative permittivity of 2.4. The transmission coefficient curve and The reflection coefficient curve is as Figure 9 As shown, there are two transmission peaks, and the first transmission peak is still at 4.24GHz, which is consistent with the results of the first three models in Example 2, proving that artificial surface plasmons can perform bend tunneling .

[0046] A working method for the tunneling effect of artificial surface plasmons, comprising the following steps:

[0047] TE in a rectangular waveguide 10 The mode is converted into an artificial surface plasmon. Under the action of the tunneling channel, t...

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Abstract

The invention discloses a tunneling effect of artificial surface plasmon and a working method thereof. The tunneling effect is composed of a rectangular waveguide, a transition waveguide, a plasma waveguide supporting artificial surface plasmon, and a tunneling channel filled with zero equivalent dielectric constants. The rectangular waveguide, the transition waveguide, and the plasma waveguide are connected in sequence and are arranged in a symmetric mode along the tunneling channel. The upper metallic part of the rectangular waveguide is dug out partially and metallic bars are arranged periodically at the dug part to form the transition waveguide and the plasma waveguide. The artificial surface plasmon excited by the plasma waveguide can be extruded into the channel and passes through the channel in a tunneling manner. According to the invention, the tunneling effect is not affected by the geometrical shape of the channel, so that the artificial surface plasmon transmission distance can be increased further and the transmission direction of the artificial surface plasmon can be changed randomly.

Description

technical field [0001] The invention belongs to the technical field of guided wave structures, and specifically refers to a tunneling effect and a working method of an artificial surface plasmon polariton based on a zero equivalent dielectric constant material. Background technique [0002] Surface Plasmon Polaritons (SPPs) are a non-radiative electromagnetic mode formed by the mutual coupling of free electrons and incident photons on the metal surface. It is an electromagnetic wave that propagates locally at the interface between the metal and the medium. The free electrons on the metal surface collectively oscillate coherently under the excitation of the incident light field, and the resonant interaction between the electromagnetic field of the incident light and the surface charges generates SPPs and endows them with unique properties. SPPs can reduce the dimension of optical control from three-dimensional to two-dimensional, realize the effective regulation of super-diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P5/08
CPCH01P5/08H01P5/082
Inventor 孙运何李茁孙恒一汪宽宋佳佳陈新蕾顾长青
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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