Volume 126, Number 5, June 2019
|Number of page(s)||5|
|Section||Physics of Gases, Plasmas and Electric Discharges|
|Published online||08 July 2019|
Terahertz wave generation by photo mixing of radially polarized hollow sinh super-Gaussian lasers in hot plasma
1 Department of Physics, Ch. Charan Singh University - Meerut, Uttar Pradesh-250004, India
2 Singh Simutech Pvt. Ltd. - Bharatpur, Rajasthan-321206, India
3 Optics Lab, Department of Applied Science, National Institute of Technology - New Delhi-110040, India
Received: 31 March 2019
Accepted: 7 June 2019
An analytical model for forward emission of radially polarized terahertz (THz) wave emission by photo mixing of two-color, radially polarized lasers having hollow sinh super-Gaussian envelopes in hot plasma with periodic density is developed. THz field distribution is optimized with the help of laser envelope parameters. Numerical investigations show that THz field amplitude is maximum at (resonant excitation). Our investigations show that THz field amplitude increases with electron temperature without affecting resonance condition. The position of THz field peaks shifts with laser parameters (i.e., orders of hollow sinh and super-Gaussian, respectively) but not with electron temperature. It is also found that THz conversion efficiency increases manifold with the increase in electron temperature.
PACS: 52.35.Hr – Electromagnetic waves (e.g., electron-cyclotron, Whistler, Bernstein, upper hybrid, lower hybrid) / 52.38.-r – Laser-plasma interactions / 52.40.Db – Electromagnetic (nonlaser) radiation interactions with plasma
© EPLA, 2019
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