Graphene and nano antenna array-based tunable directional coupler

A technology of directional coupling and nano-antenna, which is applied in the direction of instruments, optical components, nonlinear optics, etc., can solve the problems of high cost and non-tunable devices, and achieve the effect of compact structure, flexible electrical tuning, and small volume

Inactive Publication Date: 2018-08-10
TSINGHUA UNIV
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Problems solved by technology

[0004] The present invention provides a tunable directional coupling device based on graphene and nano-antenna arrays to overcome the untunable device in the prior art and the need to p

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  • Graphene and nano antenna array-based tunable directional coupler
  • Graphene and nano antenna array-based tunable directional coupler
  • Graphene and nano antenna array-based tunable directional coupler

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Embodiment Construction

[0027] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] According to one aspect of the present invention, there is provided a tunable directional coupling device based on a nano-antenna array and graphene, which is characterized in that it includes: a nano-antenna array, a first graphene layer and a waveguide; the nano-antenna array is arranged on the The upper surface of the first graphene layer; the first graphene layer is arranged above the waveguide; the nano-antenna array is used to set the preset polarization direction in free space and the working wavelength of the tunable directional coupling device The optical signal component is highly directional coupled to a specific mode in the waveguide; the first graphene ...

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Abstract

The invention provides a graphene and nano antenna array-based tunable directional coupler, which comprises a nano antenna array, a first graphene layer and a waveguide, wherein the nano antenna arrayis arranged on the upper surface of the first graphene layer; the first graphene layer is arranged above the waveguide; the nano antenna array is used for highly and directionally coupling an opticalsignal component meeting a preset polarization direction in free space and in a tunable directional coupler working band to a specific mode in the waveguide; and the first graphene layer is used forchanging the working wavelength of the tunable directional coupler under effects of external voltage. According to the graphene and nano antenna array-based tunable directional coupler provided in theinvention, as the first graphene layer is used for changing the working wavelength of the tunable directional coupler under effects of external voltage, high-speed and real-time tuning on the workingwavelength of the tunable directional coupler can be realized.

Description

technical field [0001] The invention relates to the technical field of integrated optics and nano-optics, and more specifically, to a tunable directional coupling device based on graphene and nano-antenna arrays. Background technique [0002] In integrated optics and nano-optics, miniaturizing various optoelectronic devices and integrating them on optoelectronic chips to realize the processing and operation of optical signal components is the current hot spot and frontier in scientific research and industry. Among them, how to flexibly and effectively couple the optical signal component in free space to the guided mode field in the dielectric optical waveguide is a crucial issue. In addition, with the rapid development of science and technology, the amount of communication information transmission has increased rapidly. Optical communication is widely used due to its advantages of broadband, large capacity, reliable performance, strong anti-interference and confidentiality....

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Application Information

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IPC IPC(8): G02B6/10G02B6/126G02F1/01
Inventor 孟鸢胡福泰巩马理申艺杰肖起榕
Owner TSINGHUA UNIV
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