Terahertz radiation generation by beating of two chirped laser pulses in a warm collisional magnetized plasma

doi:10.1088/1674-1056/abfb5d

中国物理B ›› 2021, Vol. 30 ›› Issue (9): 94101-094101.doi: 10.1088/1674-1056/abfb5d

Terahertz radiation generation by beating of two chirped laser pulses in a warm collisional magnetized plasma

Motahareh Arefnia^1,2, Mehdi Sharifian^2,†, and Mohammad Ghorbanalilu¹

1 Department of Physics, Shahid Beheshti University, 1983963113, Tehran, Iran;
2 Physics Department, Yazd University, Safaiyeh, Yazd, Iran

收稿日期:2020-12-17 修回日期:2021-02-22 接受日期:2021-04-26 出版日期:2021-08-19 发布日期:2021-08-31
通讯作者: Mehdi Sharifian E-mail:mehdi.sharifian@yazd.ac.ir

Terahertz radiation generation by beating of two chirped laser pulses in a warm collisional magnetized plasma

Motahareh Arefnia^1,2, Mehdi Sharifian^2,†, and Mohammad Ghorbanalilu¹

1 Department of Physics, Shahid Beheshti University, 1983963113, Tehran, Iran;
2 Physics Department, Yazd University, Safaiyeh, Yazd, Iran

Received:2020-12-17 Revised:2021-02-22 Accepted:2021-04-26 Online:2021-08-19 Published:2021-08-31
Contact: Mehdi Sharifian E-mail:mehdi.sharifian@yazd.ac.ir

摘要/Abstract

摘要： Analytical equations of terahertz (THz) radiation generation based on beating of two laser beams in a warm collisional magnetized plasma with a ripple density profile are developed. In this regard, the effects of frequency chirp on the field amplitude of the terahertz radiation as well as the temperature and collision parameters are investigated. The ponderomotive force is generated in the frequency chirp of beams. Resonant excitation depends on tuning of the plasma beat frequency, magnetic field frequency, thermal velocity, collisional frequency, and effect of the frequency chirp with the plasma density. For optimum parameters of frequency and temperature the maximum THz amplitude is obtained.

关键词: plasma, THz radiation, thermal effect, collisional effect, frequency chirp

Abstract: Analytical equations of terahertz (THz) radiation generation based on beating of two laser beams in a warm collisional magnetized plasma with a ripple density profile are developed. In this regard, the effects of frequency chirp on the field amplitude of the terahertz radiation as well as the temperature and collision parameters are investigated. The ponderomotive force is generated in the frequency chirp of beams. Resonant excitation depends on tuning of the plasma beat frequency, magnetic field frequency, thermal velocity, collisional frequency, and effect of the frequency chirp with the plasma density. For optimum parameters of frequency and temperature the maximum THz amplitude is obtained.

Key words: plasma, THz radiation, thermal effect, collisional effect, frequency chirp

中图分类号: (Laser-driven acceleration?)

41.75.Jv

42.25.Bs (Wave propagation, transmission and absorption) 52.25.Xz (Magnetized plasmas) 94.20.Fg (Plasma temperature and density)

Motahareh Arefnia, Mehdi Sharifian, and Mohammad Ghorbanalilu. Terahertz radiation generation by beating of two chirped laser pulses in a warm collisional magnetized plasma[J]. 中国物理B, 2021, 30(9): 94101-094101.

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Terahertz radiation generation by beating of two chirped laser pulses in a warm collisional magnetized plasma

Terahertz radiation generation by beating of two chirped laser pulses in a warm collisional magnetized plasma

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