M-Z electrooptical modulator provided with tunable gratings and based on graphene-molybdenum disulfide heterojunctions

An electro-optic modulator, molybdenum disulfide technology, applied in the direction of instruments, optics, nonlinear optics, etc., can solve the problems of poor modulation depth, small temperature tolerance, and inconvenient size, and achieve small insertion loss, large tolerance, and reduced effect of size

Inactive Publication Date: 2017-08-11
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to overcome the problems of large size, inconvenient integration, poor modulation depth, small extinction ratio, and small temperature tolerance of the prior art, the present invention provides a M-Z electro-optic with tunable grating based on graphene-molybdenum disulfide heterojunction Modulator

Method used

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  • M-Z electrooptical modulator provided with tunable gratings and based on graphene-molybdenum disulfide heterojunctions
  • M-Z electrooptical modulator provided with tunable gratings and based on graphene-molybdenum disulfide heterojunctions
  • M-Z electrooptical modulator provided with tunable gratings and based on graphene-molybdenum disulfide heterojunctions

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Embodiment 1

[0041] In conjunction with the accompanying drawings, this embodiment uses light waves with a wavelength of 1.55 μm, the material of the substrate layer 1 is silicon dioxide, the input-output tunable grating 2, the input-output straight optical waveguide 3, the S-curved Y-branched waveguide 4, and the two-armed straight optical waveguide. The waveguide material of the waveguide 5 is silicon nitride, the width and thickness of the waveguides of the input-output tunable grating 2, the input-output straight optical waveguide 3, the S-curved Y-branch waveguide 4, and the two-arm straight optical waveguide 5 are 1 μm and 0.3 μm respectively . The material of the first electrode 64 , the second electrode 65 , the third electrode 66 , the fourth electrode 74 and the fifth electrode 75 is gold.

[0042] Figure 4 It is a schematic diagram of the working principle of the electro-optic modulator in this embodiment. First, an external voltage is applied to the fourth electrode 74 and th...

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Abstract

The invention belongs to the photoelectronic technical field, and discloses an M-Z electrooptical modulator provided with tunable gratings and based on graphene-molybdenum disulfide heterojunctions. The M-Z electrooptical modulator comprises a substrate layer, the in-out tunable gratings, in-out straight-light waveguides, S-type bent Y-branch waveguides and a two-arm straight light waveguide, wherein the in-out tunable gratings, the in-out straight-light waveguides, the S-type bent Y-branch waveguides and the two-arm straight light waveguide are fully embedded in the substrate layer and successively connected with each other, and the two-arm straight light waveguide is successively provided with a second graphene layer, molybdenum disulfide and a first graphene layer from the bottom up; the second graphene layer is connected to a second electrode mounted between the two arms, and each in-out tunable grating is successively provided with a fourth graphene layer, a boron nitride isolation layer and a third graphene layer while the third and the fourth graphene layers are connected to the a fourth electrode and a fifth electrode respectively. Compared with the prior art, the M-Z electrooptical modulator has the advantages of being small in size, easy to integrate, deep in modulation, high in extinction ratio, big in temperature tolerance and the like.

Description

technical field [0001] The invention belongs to the technical field of optoelectronic devices, and in particular relates to an M-Z electro-optical modulator with tunable gratings based on graphene-molybdenum disulfide heterojunction. Background technique [0002] The optical modulator is a key device in the optical communication system, and its performance directly affects the transmission quality of the optical signal and the stability of the system. The M-Z electro-optic modulator is an external modulator using an interferometer structure. By applying different voltages to the reference arm and the modulating arm, the phase of the light wave is changed, so that the light wave interferes constructively or destructively at the output end, thereby converting the phase change into Light intensity changes to achieve intensity modulation. Grating refers to a diffraction system with periodic changes in optical parameters or spatial structure distribution, which can reflect, refr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/035G02F1/03
CPCG02F1/035G02F1/0316
Inventor 陆荣国张向秀刘天良杜玮杨忠华田朝辉刘永
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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