Planar multi-electron-beam excitation graphene sub-wavelength grating-integrated terahertz radiation source

Abstract

The invention relates to a planar multi-electron-beam excitation graphene sub-wavelength grating-integrated terahertz radiation source and application of the terahertz radiation source. The terahertzradiation source comprises a shell, an electron gun cathode, a grating structure, partition plates, and an output port; the shell is used for protecting the terahertz radiation source; the electron gun cathode is arranged on one side of the opening of the shell and is used for emitting multiple electron beams; the grating structure is arranged in the shell; a graphene layer is arranged on the surface of the grating structure; and the surface plasmon polaritons of the graphene layer interact with the multiple electron beams, so that terahertz radiation can be generated; the partition plates arearranged between every two adjacent electron beams and are used for isolating the electron beams; and the output port is arranged on the shell and is used for outputting the terahertz radiation. According to the terahertz radiation source of the invention, the coupling effect of the electron beams and an integrated high-frequency system is fundamentally enhanced; beam-wave interaction efficiencyis improved; the problems of the low interaction efficiency and low output power which confront the development of a vacuum electronic device towards a terahertz wave band are solved; the output powerof the terahertz radiation source can be greatly improved; and the processing of engineering tubing and the realization of a high-power terahertz source are facilitated.

Description

technical field [0001] The invention relates to the field of vacuum electronics terahertz technology, in particular to a terahertz radiation source for planar multi-electron injection excitation graphene sub-wavelength integrated grating. Background technique [0002] Terahertz wave (THz for short) refers to an electromagnetic wave with a frequency between 0.1-10 THz and a wavelength range of 3mm-30um. Terahertz waves are located between the far-infrared and submillimeter wave bands. They are a transitional field between electronics and photonics. They have unique electromagnetic wave properties, such as high transmittance, high resolution, low energy, coherence, and bandwidth. Terahertz technology is an innovative means to open up new fields of science at present, and has great application potential in biomedicine, material science, wireless communication, etc. [0003] Terahertz radiation source is a key device for the wide application of terahertz technology. The generat...

AI Technical Summary

Problems solved by technology

However, the lack of high-power integrated terahertz radiation sources seriously restricts the application of terahertz waves in various fields.

Traditional vacuum electronic devices are the main way to generate high-power microwaves. However, due to high-frequency loss and low interaction efficiency, it is difficult to expand to the terahertz band.

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