Device for realizing conversion between space waves and artificial terahertz surface plasmon polariton (SPP) waves

An artificial surface plasmon and space wave technology, applied in electrical components, optical components, waveguide-type devices, etc., can solve the problems of low efficiency, limit the development and application of terahertz SSPP devices, and achieve good application prospects, light weight, Small size effect

Active Publication Date: 2015-06-24
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the efficiency of direct conversion of space waves into SPP waves is very low, which largely limits the development and application of terahertz SSPP devices.

Method used

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  • Device for realizing conversion between space waves and artificial terahertz surface plasmon polariton (SPP) waves
  • Device for realizing conversion between space waves and artificial terahertz surface plasmon polariton (SPP) waves
  • Device for realizing conversion between space waves and artificial terahertz surface plasmon polariton (SPP) waves

Examples

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Effect test

example 1

[0024] Such as figure 2 As shown, on the low-loss flexible Rogers 5880 dielectric substrate, the metal slotted structure is prepared by microlithography, and the unit size is as follows: the horizontal period of the structure p = 75um; the vertical width of the structure is 1412um; the width of the middle slot is 12um; The defects in the structure are 25um wide and 50um high. The corresponding exponential function equation of the first metal sheet is: Where d=1976um, h=812um, s=12um, c=3. . The second metal sheet is symmetrical to the first metal sheet about the x-axis. The simulation results of the CST Microwave Studio show (the monitoring frequency is 0.6THz, and the distance between the monitoring position and the structure surface is 15 microns), when the terahertz plane wave is incident along the horizontal direction, the SPP wave can be effectively excited.

example 2

[0026] Such as image 3 As shown, on the low-loss flexible Rogers 5880 dielectric substrate, the metal slotted structure is prepared by microlithography, and the unit size is as follows: the horizontal period of the structure p = 75um; the vertical width of the structure is 1412um; the width of the middle slot is 12um; The defects in the structure are 25um wide and 50um high. The corresponding exponential function equation of the first metal sheet is: Where d=1976um, h=812um, s=12um, c=3. The second metal sheet is symmetrical to the first metal sheet about the x-axis. The simulation results of CST Microwave Studio show (the monitoring frequency is 0.6THz, and the distance between the monitoring position and the structure surface is 15 microns), when the plane wave is incident along the oblique direction, that is, when the incident surface is in the x-y plane and the electric field has both x and y direction components (incident The angle θ is 45°), the structure can still ...

example 3

[0028] Such as Figure 4 As shown, on the low-loss flexible Rogers 5880 dielectric substrate, the metal slotted structure is prepared by microlithography, and the unit size is as follows: the horizontal period of the structure p = 75um; the vertical width of the structure is 1412um; the width of the middle slot is 12um; The defects in the structure are 25um wide and 50um high. The corresponding exponential function equation of the first metal sheet is: Where d=1976um, h=812um, s=12um, c=3. . The second metal sheet is symmetrical to the first metal sheet about the x-axis. The simulation results of the CST microwave studio show (the monitoring frequency is 0.6THz, and the distance between the monitoring position and the surface of the structure is 15 microns), when the incident surface is on the x-z plane (incident angle φ is 45°), and the electric field is along the y direction, the structure can also Accepts plane waves and converts them to SPP waves.

[0029] It can be ...

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Abstract

The invention discloses a device for realizing conversion between space waves and artificial terahertz surface plasmon polariton (SPP) waves. The device comprises a medium substrate and two metal sheets fixedly connected to media to form a mirror-image relation. The metal sheets are provided with grooves arranged periodically. The depths of the grooves gradually increase from the two ends to the middle parts of the metal sheets and keep constant after being increased to a specific value. The widths of the grooves are equal. A gap is formed between one end of one metal sheet and one end of the other metal sheet. The gap is widened from the rear end to the front end in an exponential form until the width of the gap exceeds the width of each metal sheet. The device can realize effective conversion between the terahertz space waves and the SPP waves within a wide frequency range and a large angle range on the basis of novel artificial electromagnetic materials, and has the advantages of being small in size, low in weight, capable of being bent and the like, thereby having good application prospect in terahertz functional devices.

Description

technical field [0001] The invention relates to a conversion device for space waves in the terahertz frequency band and artificial surface plasmons, and belongs to the field of new artificial electromagnetic materials. Background technique [0002] Surface plasmon polariton (SPP) is a special surface electromagnetic wave mode, which usually exists at the metal-dielectric interface (or metal-air interface) in the optical band. The basic principle of this electromagnetic wave generation is: in the optical band, the dielectric constants of the metal and the medium are different, and the electromagnetic wave incident on the metal-medium interface cannot penetrate the metal, but can only be localized on the interface and propagate along the interface. . With the extensive research of new artificial electromagnetic materials (Metamaterials), artificially designed metal periodic structures can realize the characteristics of plasmon resonance and negative dielectric constant at ver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/14G02B6/122H01P1/16
CPCG02B6/1226G02B6/14H01P1/16
Inventor 崔铁军傅晓建张浩驰徐俊珺
Owner SOUTHEAST UNIV
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