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Surface plasmon polaritons optical waveguide of nanowire arrays

A surface plasmon and nanowire array technology, applied in the field of ion polariton optical waveguide, can solve the problem of inability to balance the mode field confinement capability and transmission loss, and achieve the effect of low transmission loss, strong mode field confinement capability, and easy integration.

Inactive Publication Date: 2012-07-11
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The waveguide structure overcomes the problem that the traditional surface plasmon optical waveguide structure cannot balance the two physical quantities of mode field confinement capability and transmission loss

Method used

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  • Surface plasmon polaritons optical waveguide of nanowire arrays
  • Surface plasmon polaritons optical waveguide of nanowire arrays
  • Surface plasmon polaritons optical waveguide of nanowire arrays

Examples

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example 1

[0035] Example 1: The center point of the metal nanowire and the center point of the high refractive index medium nanowire are at the same horizontal position (the Y coordinate is the same) (corresponding to the two connecting lines between the center of the two high refractive index medium nanowires and the center of the metal nanowire respectively The inner vertex angle of the included angle is 180 degrees)

[0036] figure 2 It is a structural schematic diagram of the nanowire array surface plasmon optical waveguide described in Example 1. 201 is a cylindrical metal nanowire (end face is circular), and its width is w m , with height h m , the refractive index n m ; 202 is a cylindrical high-refractive-index dielectric nanowire (end face is circular) on the left side of 201 (that is, along the X-axis negative direction), and its refractive index is n d , with a width of w g , with height h g , g is the minimum distance from 201 to the right edge of 202; 203 is the cyli...

example 2

[0044] Example 2: The center point of the metal nanowire and the center point of the high refractive index medium nanowire are not at the same horizontal position (the Y coordinates are different)

[0045] Figure 7 It is a structural schematic diagram of the nanowire array surface plasmon optical waveguide described in Example 2. 701 is a cylindrical metal nanowire (the end face is circular), and its width is w m , with height h m , the refractive index n m ; 702 is a cylindrical high-refractive-index dielectric nanowire (end face is circular) on the left side of 701 (that is, along the X-axis negative direction), and its refractive index is n d , with a width of w g , with height h g , g is the minimum distance from the right edge of 701 to 702, the angle between the line connecting the centers of 701 and 702 and the horizontal line passing through the center of 701 is θ; Ratio dielectric nanowire (end face is round), its refractive index is n d , with a width of w g...

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Abstract

The invention discloses a structure of surface plasmon polaritons optical waveguide of nanowire arrays, which has low transmission loss and strong mode field limiting capability simultaneously. According to the waveguide structure, a cross section comprises a metal nanowire (1) embedded in a low refractive index medium (4) and two high refractive index medium nanowires (2 and 3) on the left and right side of the metal nanowire respectively. The metal nanowire and the two high refractive index medium nanowires close to the metal nanowire can remarkably limit the light field to low refractive index slot areas on the two sides of the metal nanowire, therefore the limit to two-dimensional sub-wavelength of the transmission light field is achieved and simultaneously, the transmission loss is still low. The optical waveguide structure overcomes the conflicts of the existing surface plasmon polaritons optical waveguide between the light field limiting capability and the transmission loss, and the transmission distance is further improved on the premise that the limitation of the sub-wavelength mode field is guaranteed. The waveguide can be used for constructing various passive and activeintegrated photonic devices and provides a possibility for achieving high density integrated optics.

Description

technical field [0001] The invention relates to the field of optical waveguide technology, in particular to a nanowire array surface plasmon optical waveguide. Background technique [0002] In recent years, nanowire photonics technology has developed rapidly, and research in related fields has attracted widespread attention from experts and scholars at home and abroad. Due to their excellent optical and electrical properties, nanowires have been widely used in various optical and optoelectronic devices, covering from guided wave to excitation light radiation, etc., in electronic communications, information storage, biochemical sensors, nanolithography, etc. It has strong application value in many aspects. [0003] On the other hand, as one of the most popular research directions of surface plasmons, surface plasmon photonic waveguide technology has become a research hotspot pursued by experts and scholars at home and abroad. Surface plasmon waveguides can break through the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/10
Inventor 郑铮卞宇生赵欣刘磊苏亚林刘建胜
Owner BEIHANG UNIV