Polarization beam splitter and beam splitting method based on surface plasmonic hybrid waveguide

A surface plasmon and polarization beam splitter technology, which is applied in the field of nanophotonics, can solve the problems of narrowing the working bandwidth and expanding the visible light band, and achieves the effects of small device size, strong practicability and high flexibility

Active Publication Date: 2017-10-03
CHINA ACADEMY OF SPACE TECHNOLOGY
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Problems solved by technology

[0004] However, the size of existing silicon-based polarization beam splitters is usually tens of microns in size, the working bandwidth is narrow, and it is difficult to extend from near-infrared to visible light bands.

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  • Polarization beam splitter and beam splitting method based on surface plasmonic hybrid waveguide
  • Polarization beam splitter and beam splitting method based on surface plasmonic hybrid waveguide
  • Polarization beam splitter and beam splitting method based on surface plasmonic hybrid waveguide

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Embodiment Construction

[0045] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the public implementation manners of the present invention in detail with reference to the accompanying drawings.

[0046] refer to figure 1 , shows a schematic structural diagram of a polarization beam splitter based on a surface plasmon hybrid waveguide in an embodiment of the present invention. In this embodiment, the polarization beam splitter based on surface plasmon hybrid waveguide includes: a housing 100, and a first optical waveguide 200 and a second optical waveguide 300 arranged in the housing 100 .

[0047] Such as figure 1 , the first optical waveguide 200 and the second optical waveguide 300 are arranged in parallel, asymmetrically and at intervals. Wherein, the space between the first optical waveguide 200 and the second optical waveguide 300 forms a nano-slit 400 .

[0048] In this embodiment, the first optical wavegui...

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Abstract

The invention discloses a polarization beam splitter and beam splitting method based on a surface plasmonic hybrid waveguide. The polarization beam splitter comprises a housing, a first optical waveguide, and a second optical waveguide, wherein the first optical waveguide and the second optical waveguide that are arranged in the housing are arranged in parallel at an interval in an asymmetric manner. A nano slit is formed at the interval of the first optical waveguide and the second optical waveguide. The first optical waveguide and the second optical waveguide are formed by metal thin films, low-refractive-index films, high-refractive-index films and nano grooves. The cavity among the housing, the first optical waveguide and the second optical waveguide is filled with air. The polarization beam splitter has advantages of ultra small size, ultra low crosstalk, large operating bandwidth, and high integration.

Description

technical field [0001] The invention belongs to the technical field of nanophotonics, and in particular relates to a polarization beam splitter and a beam splitting method based on a surface plasmon hybrid waveguide. Background technique [0002] Surface plasmons are electromagnetic field modes in which free electrons collectively oscillate at the metal-dielectric interface and can propagate along the metal-dielectric interface. The ultra-small sub-wavelength mode area and local resonance properties of surface plasmons have a wide range of practical applications in many fields, such as light manipulation at the nanoscale, biological detection at the single-molecule level, and light transmission with sub-wavelength apertures. High-resolution optical imaging that enhances and breaks through the diffraction limit, etc. [0003] As many nano-device design schemes have been proposed, people are eager to use the properties of surface plasmons to realize the development of new dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/126G02B6/122
CPCG02B6/1226G02B6/126
Inventor 路翠翠郭伟轩陈睿轩崔方明
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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