Terahertz radiation generation method based on interaction of multiple electron beams and plasma

Abstract

The invention discloses a terahertz radiation generation method based on interaction of multiple electron beams and plasma. The method comprises the following steps of ionizing a neutral gas by using a plasma source, and generating plasma in a certain density range in a vacuum cavity; injecting a plurality of (two or more) electron beams into the plasma at a certain emission included angle, adjusting the emission included angle between the electron beams in advance to enable the electron beams to form a convergence point in the plasma, and when the electron beams converge to one point in the plasma, exciting plasma waves at the convergence point; and finally, enabling the plasma wave to cause the electron oscillation at the electron beam convergence point, so that the high-power terahertz radiation with the frequency located at the plasma frequency and the frequency doubled by the plasma frequency is excited.

Description

technical field

[0001] The invention belongs to the technical field of electromagnetic radiation, and more specifically relates to a method for generating terahertz radiation based on the interaction between multiple electron beams and plasma. Background technique

[0002] Terahertz radiation refers to the frequency between 0.1THz and 10THz (1THz=10 12 Hz) electromagnetic radiation. Electromagnetic radiation in this band occupies a special position on the electromagnetic spectrum, belonging to the transition region from classical physics to quantum physics, and from electronics to photonics. Terahertz radiation has some physical properties that electromagnetic waves in other bands do not have, such as: high penetration, low damage, ultra-high bandwidth, material fingerprint characteristics, etc. with broadly application foreground.

[0003] As the basis for many applications of terahertz radiation, terahertz sources have important research value. In recent years, a new t...

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