A light splitting device based on the composite structure of graphene and silicon waveguide

Abstract

The present invention provides a light-splitting device of a graphene and silicon waveguide-based composite structure. The device comprises a plurality of series-connected silicon waveguides. Each silicon waveguide adopts a cross structure and the graphene is covered on the upper surface of the silicon waveguide. Each silicon waveguide comprises a middle part, an input port and an output port, wherein the input port and the output port are arranged at the two ends of the middle part along the series direction. The width of the middle part is larger than the width of the input port and the width of the output port so as to form the cross structure. The series-connected silicon waveguides are placed on the upper surface of a silicon dioxide substrate. An external electric field is applied on the grapheme on the upper surface of the silicon waveguide at each level. The voltage of the external electric field is sequentially reduced along the series-connected direction. In this way, the graphene and silicon waveguide-based composite structure at each level enables the sequential reduction of the threshold frequency of photons. Meanwhile, the graphene and silicon waveguide-based composite structure at each level converts an absorbed photon into an electric signal, so that the light splitting and the photoelectric conversion are realized. The light-splitting device is simple in structure, light in weight, high in speed and high in reliability.

Description

technical field [0001] The invention relates to the field of optics, in particular to a light splitting device. Background technique [0002] Optical fiber connectors and optical splitting devices are the joints of the optical transmission system. Traditional photonic optical splitting devices are large in size and narrow in wavelength range. At the same time, the frequency band is not adjustable and the coupling efficiency is low. This composite structure of graphene and silicon waveguide is proposed and realized by us. A new type of miniature spectroscopic device is a new type of spectroscopic method that can be matched with a detector to form a micro spectrometer with simple structure, light weight, high speed and high reliability. The structure we designed has the following advantages: Contents of the invention [0003] The main technical problem to be solved by the present invention is to overcome the disadvantages of traditional light splitting devices, and propose ...

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Problems solved by technology

[0002] Optical fiber connectors and optical splitting devices are the joints of the optical transmission system. Traditional photonic optical splitting devices are large in size and narrow in wavelength range. At the same time, the frequency band is not adjustable and the coupling efficiency is low. This composite structure of graphene and silicon waveguide is proposed and realized by us. A new type of miniature spectroscopic device, which is a new type of spectroscopic method that can be matched with a detector and jointly constitute a miniature spectrometer with simple structure, light weight, high speed and high reliability

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