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Structural design of novel graphene light modulator

A technology of structural design and modulator, applied in the field of integrated optics and silicon-based photonics, can solve the problems of limited influence and limited thickness of waveguides, and achieve the effect of improving interaction, reducing crosstalk, and mature technology

Active Publication Date: 2020-04-10
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, the limited thickness of single-layer graphene makes the influence of graphene absorption coefficient and refractive index change on the waveguide limited

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  • Structural design of novel graphene light modulator

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] from figure 1 It can be seen that the structural design of a novel graphene optical modulator in the present invention is an electro-optic modulator realized based on the electrical control characteristics of graphene. The device includes a substrate layer (1), an artificial metamaterial waveguide layer (2), a double-layer graphene layer (3), an ultra-thin optical waveguide layer (4), a low refractive index cover layer (5), and a first electrode (6) and the second electrode (7). Among them, the artificial metamaterial waveguide layer (2) is buried in the substrate layer (1); the optical waveguide part of the modulator consists of an artificial metamaterial waveguide layer (2), a double-layer graphene layer (3) and an ultra-thin optical waveguide layer (4) constitute; On the ultra-thin optical waveguide layer, one covers the first refractive index covering laye...

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Abstract

The invention, which belongs to the field of integrated photonics and silicon-based photonics, discloses a structural design of a novel graphene light modulator. The novel graphene optical modulator structure comprises a substrate layer, an artificial metamaterial waveguide layer, a double-layer graphene layer, an ultrathin optical waveguide layer, a low-refractive-index cover layer and an electrode.The artificial metamaterial waveguide layer is formed by alternately arranging high-refractive-index materials and low-refractive-index materials; and the double-layer graphene layer is composed oftwo layers of graphene and a dielectric filling layer. According to the invention, the artificial metamaterial structure is used as a part of the optical waveguide structure and thus the distributionof an optical field can be effectively adjusted and the interaction between graphene and light can be enhanced, so that the modulation depth and modulation efficiency are improved; meanwhile, the interference between devices is reduced by controlling evanescent waves, and the integration density of the devices is improved. The modulator has the advantages of large working bandwidth, high modulation rate, compact structure and the like, and an effective solution is provided for constructing a large-bandwidth, high-density integrated and high-speed system on chip.

Description

technical field [0001] The invention relates to the field of integrated optics and silicon-based photonics, in particular to a novel graphene light modulator structure design, more specifically utilizing the metamaterial structure to regulate the light field, enhancing the interaction between graphene and the light field and the control of the light field constraints to realize high-density, large-bandwidth, high-speed silicon-based optical modulators. Background technique [0002] Silicon-based optoelectronics technology has become a key technology with the most development potential in the optical interconnection technology generally recognized by the industry because of its advantages such as large bandwidth, high-density integration, high transmission rate, anti-interference, and compatibility with traditional CMOS processes. As the core device in optical interconnect technology, optical modulator has important research significance. In recent years, due to the superior...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/03G02F1/035
CPCG02F1/0316G02F1/035
Inventor 饶岚忻向军张琦杨雷静何晓颖田清华田凤刘博
Owner BEIJING UNIV OF POSTS & TELECOMM
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