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A hybrid plasmonic waveguide Bragg grating with double forbidden bands

A meta-waveguide Bragg and plasmonic technology, applied in the field of integrated optics and optical communication, can solve the problems of long-distance transmission, etc., and achieve the effect of simple structure, optimization of position and transmission spectrum, and optimization of adjustment

Active Publication Date: 2020-06-26
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
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  • Application Information

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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 hybrid plasmonic waveguide Bragg grating with double forbidden bands
  • A hybrid plasmonic waveguide Bragg grating with double forbidden bands
  • A hybrid plasmonic waveguide Bragg grating with double forbidden bands

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Embodiment Construction

[0023] 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.

[0024] The present invention discloses 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 formed by two sets of hybrid plasmonic waveguide Bragg gratings with different periodic structures in series and the admittance matching waveguide coupling at the input end and the output end. The first group of hybrid plasmonic waveguide Bragg gratings is formed by alternate arrangement of two kinds of waveguides, and the second group of hybrid plasmon...

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Abstract

The invention discloses a mixed Plasmon waveguide Bragg grating with double-forbidden band; the mixed Plasmon waveguide Bragg grating comprises two mixed Plasmon waveguide Bragg grating sets with different period structures and coupled with admittance coupling waveguides on an incident terminal and emission terminal; the first set of mixed Plasmon waveguide Bragg grating is formed by alternativelyarranging two waveguides; the second set of mixed Plasmon waveguide Bragg grating is formed by alternatively arranging two waveguides; the two mixed Plasmon waveguide Bragg grating sets are respectively formed by periodically and alternatively filling two low refractive index materials A and B between a metal Ag bar and a high refractive index material Si. The mixed Plasmon waveguide Bragg grating is simple in structure, and can stop a TM mode on two assigned broadband positions; the waveguide length and grating period in a coupling zone can be changed so as to dynamically select transmissionbands in an assigned wave band, thus adjusting and optimizing the passband and forbidden band positions and performances.

Description

technical field [0001] The invention relates to a hybrid plasmonic 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 high-refractive i...

Claims

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Application Information

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