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A Surface Plasmon Optical Switch Based on Periodic Subwavelength Hole Array

A surface plasmon and optical switch technology, applied in the direction of nonlinear optics, optics, optical components, etc., can solve the problems of complex structure of surface plasmon optical switch, interference of pumping light, etc., and achieve simple structure, convenient operation, and small size Effect

Inactive Publication Date: 2018-08-07
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] What the present invention needs to solve are the problems of complex structure and interference of pump light in the existing surface plasmon optical switch, and provide a surface plasmon optical switch with simple structure and no interference of pump light

Method used

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  • A Surface Plasmon Optical Switch Based on Periodic Subwavelength Hole Array
  • A Surface Plasmon Optical Switch Based on Periodic Subwavelength Hole Array
  • A Surface Plasmon Optical Switch Based on Periodic Subwavelength Hole Array

Examples

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Embodiment 1

[0047] The material of the dielectric substrate 1 is quartz, with a thickness of 225nm; the material of the metal thin film 2 is silver, with a thickness of 50nm. The shape of the hole array is square, and the array period Px=Pz=600nm. The pore size D of a single pore 3 is 354 nm, the angle θ of the tip is 53°, and the length L of the base of the tip is 70 nm. The bottom length of the tip is the distance between the intersection point of the tip (first outer tip 31, second outer tip 32, first inner tip 33, second inner tip 34) and the circumference, image 3 is the spatial distribution diagram of the electric field z component Ez in the (x, z) plane at the silver / quartz interface of the open state cell structure in this embodiment. Since the polarization direction of the incident light is along the z axis, the first outer tip 31 and the second outer tip 32 are distributed perpendicular to the polarization direction of the incident light, and the first inner tip 33 and the sec...

Embodiment 2

[0049] The present invention can be effectively regulated by changing the material type, material thickness, array shape, array period, and the structural parameters of the hole 3 (aperture size, tip angle, tip bottom length) and other parameters of the surface plasmon optical switch based on the periodic hole array. The performance of the optical switch satisfies the use requirements in different environments.

[0050] Embodiment 2 shows a surface plasmon optical switch based on a periodic subwavelength hole array that can be used in an optical communication environment. The material of the dielectric substrate 1 is quartz, with a thickness of 225nm; the material of the metal thin film 2 is silver, with a thickness of 50nm. The shape of the hole array is square, and the array period Px=Pz=600nm. The pore size D of a single hole 3 is 354 nm, the angle θ of the tip is 53°, and the length L of the base of the tip is 110 nm. Image 6 is the transmittance spectrum in Example 2, ...

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Abstract

The invention provides a surface plasma optical switch based on periodic subwavelength hole arrays. The optical switch is a micro and nano structure composed of a dielectric base plate and a metal thin film located on the dielectric base plate, the material of the metal thin film is a metallic material capable of producing surface plasma. Multiple identical holes are arranged on the metal thin film, each hole is periodically arranged and an array is formed. An internal tip and an external tip are arranged on the holes, the external tip comprises a first external tip and a second external tip oppositely arranged, the internal tip comprises a first internal tip and a second internal tip oppositely arranged, the two external tips are tips extending in the center direction of a dorsad hole, the two internal tips are tips extending in the center direction of the orientation hole. The device of the surface plasma optical switch comprises only the dielectric base plate and the metal thin film with hole arrays, the device is small in size, simple in structure; in addition, the near-infrared optical switch can be controlled by simply changing the direction of polarization of the incident light, the optical switch is easy to operate, interferences by pump lights on signal lights and subsequent optical paths are nil.

Description

technical field [0001] The invention relates to the field of micro-nano photonic devices, in particular to a surface plasmon optical switch based on a periodic subwavelength hole array. Background technique [0002] With the advancement of society, it is difficult for electronic devices to meet people's demand for information transmission speed and storage capacity, so some researchers have turned their attention to photonic devices. Due to the problem of diffraction limit, photonic devices cannot be miniaturized and integrated, which greatly limits the application of photonic devices in the information field. Surface plasmon (SurfacePlasmon, SP) has excellent characteristics such as subwavelength, electric field localization and local field enhancement, and provides an effective method to solve this problem. Using SP, people have designed and implemented many micro-nano photonic devices. Among them, the surface plasmon optical switch changes the excitation or transmission ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/01G02F1/00G02B5/00
CPCG02B5/008G02F1/0009G02F1/0126
Inventor 王新林盛佳兵孙太明邓志象陈志勇朱卫华郭玮
Owner NANHUA UNIV