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A Design Method of Hybrid Plasmonic Waveguide Bragg Gratings with Double Gap

A technology of meta-waveguide Bragg and plasmonic waveguide, which is applied in the field of integrated optics and optical communication, can solve problems such as inability to use long-distance transmission, and achieve the effect of simple design method and simple design process

Active Publication Date: 2019-12-31
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Among them, the surface plasmon waveguide breaks through the constraints of the diffraction limit in traditional optical research, but due to the existence of ohmic losses, the waveguide cannot be used for long-distance transmission

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  • A Design Method of Hybrid Plasmonic Waveguide Bragg Gratings with Double Gap
  • A Design Method of Hybrid Plasmonic Waveguide Bragg Gratings with Double Gap
  • A Design Method of Hybrid Plasmonic Waveguide Bragg Gratings with Double Gap

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Embodiment Construction

[0038] Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. These embodiments are only typical examples of applying the technical solutions of the present invention, and all technical solutions formed by adopting equivalent replacements or equivalent transformations fall within the protection scope of the present invention.

[0039] The invention discloses a design method of a hybrid plasmonic waveguide Bragg grating with double forbidden bands, such as figure 1 and figure 2 As shown, the hybrid plasmonic waveguide Bragg grating is composed of two sets of hybrid plasmonic waveguide Bragg gratings with different periodic structures connected in series and admittance matching waveguides at the input and output ends.

[0040] figure 1 It is a schematic diagram of the structural design of the hybrid plasmonic waveguide, where w1=100nm is the width of the metal Ag strip, h1...

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Abstract

The invention discloses a designing method of hybrid isoionic surface plasmon waveguide Bragg grating with double forbidden bands. The method comprises the steps that S1, a hybrid isoionic surface plasmon waveguide structure is constructed, two low reflection rate materials are selected, and hybrid isoionic surface plasmon mode is excited and defined in a low reflection rate layer through adjusting structural parameters of hybrid isoionic surface plasmon waveguide; S2, effective reflection rate is calculated, the vertical incidence into the Bragg grating of an incident ray is taken as an incident direction condition, and the effective reflection rate of the waveguide is obtained according to determined optical wave frequency bands and structural parameters; S3, a Bragg grating structure isconstructed; S4, Bragg grating serial connection is conducted, two groups of hybrid isoionic surface plasmon waveguide Bragg gratings are in serial connection with each other; S5, admittance matchingis conducted. The designing method of the hybrid isoionic surface plasmon waveguide Bragg grating with adjustable double forbidden bands is particularly suitable for achieving precised selection of lasers with designated wavelengths and achieving mode frequency selecting of dynamic broad bands.

Description

technical field [0001] The invention relates to a design method of a hybrid plasmon waveguide Bragg grating with double forbidden bands, which can be used in technical fields such as optical communication and integrated optics. Background technique [0002] In the development of the modern communication field, the improvement of device integration has always been an important pursuit in the research of photonics. Various nano-optical waveguide structures represented by photonic crystal waveguides and surface plasmon waveguides have been proposed and accepted. develop. Among them, the surface plasmon waveguide breaks through the constraints of the diffraction limit in traditional optical research, but due to the existence of ohmic losses, the waveguide cannot be used for long-distance transmission. In order to achieve a compromise between loss and confinement, a hybrid surface plasmon waveguide is proposed. By introducing a low-refractive-index gap between the metal and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/124G02B6/122
CPCG02B6/1226G02B6/124
Inventor 许吉张雨高旭王云帆陈奕霖陆昕怡刘宁陆云清
Owner NANJING UNIV OF POSTS & TELECOMM
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