A surface plasmon propagation device with full compensation of graphene waveguide excited by periodic diffraction folds

Abstract

The invention discloses a surface plasma transmission device for graphene waveguide full-course compensation excited by periodic diffraction corrugation. The surface plasma transmission device comprises an Si substrate and a SiO2 medium layer oxidized by the Si substrate, and is characterized in that a graphene waveguide for transmitting surface plasmas is arranged on the surface of the graphene waveguide; a corrugation structure for exciting SPPs is engraved at one end of the graphene waveguide; the SiO2 medium layer on the side at the other end of the graphene waveguide is filled with an incremental medium. According to the device, the bottlenecks that an element is large in size and high in integration difficulty in an SPPs transmission distance increasing process can be overcome, and the noise loss generated by spontaneous radiation in a channel can be avoided; the cost is low, and implementation is easy.

Description

Technical field [0001] The invention relates to optical communication technology, in particular to a surface plasmon propagation device with full compensation in graphene waveguide excited by periodic diffraction folds. Background technique [0002] At present, Surface plasmon polaritons (SPPs) play an important role in manipulating light energy at the nanometer level and have become a new type of technology in the fields of broadband communication systems, micro-photonic circuits, etc. Scholars at home and abroad use this The technology has realized the design of a variety of signal transmission and photonic devices. In particular, the Danish Nikolajsen research team used thermo-optical effects to realize optical modulators and optical switches on metal strips embedded in polymer materials, and used 20nm thick gold plate waveguides. The transmission loss in the optical communication wavelength window is as low as 6 dB / cm, but the mode size of this waveguide has reached 12 μm. I...

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Problems solved by technology

[0003] "Physical Review Letters" published the article "Channelplasmon-polariton guiding by subwavelength metal grooves" on page 046802, Volume 95, Issue 4, 2005. Bozhevolnyi's team at Aalborg University in Denmark used focused ion beam etching and near-field scanning optics The V-groove SPPs waveguide device discovered by microscope research, they also designed a wavelength division multiplexer and a Bragg grating filter based on the MIM structure, and realized the filtering characteristics of the SPPs wave, but the SPPs propagation distance is only 10 μm, which is It is obviously impossible to realize the application of photonic circuit and optical communication

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