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<p>The effectiveness of terahertz (THz) generation in plasma-based systems utilizing a Gaussian laser beam is greatly affected by ripple plasma density, plasma collisional frequency, and transverse distance. The study examines the impact of ripple amplitude, plasma density, collisional frequency, and transverse distance on THz generation efficiency by solving the governing equations under different situations. Results indicate that adjusting plasma density to create ripples improves phase-matching conditions and nonlinear interactions, thereby enhancing energy conversion efficiency, with ripple amplitudes and periodicity necessitating meticulous calibration to prevent adverse consequences. Enhanced plasma density augments efficiency by reinforcing coupling and phase-matching, whereas elevated collisional frequencies attenuate nonlinear processes through energy dissipation, hence diminishing efficiency. The transverse distance influences laser intensity and spatial overlap, with efficiency reaching its maximum at the high-intensity core of the Gaussian beam. These findings underscore the necessity of meticulous regulation of plasma conditions to optimize THz production efficiency in practical applications.</p>

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Dynamics of terahertz generation in collisional plasma with density modulations using radially polarized lasers

  • 期刊论文

  • 发表日期：

    2025年2月27日

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  • Jasveer Singh,
  • Sunita Rani,
  • Hitesh Kumar Midha,
  • Vivek Sharma,
  • Vishal Thakur

摘要

The effectiveness of terahertz (THz) generation in plasma-based systems utilizing a Gaussian laser beam is greatly affected by ripple plasma density, plasma collisional frequency, and transverse distance. The study examines the impact of ripple amplitude, plasma density, collisional frequency, and transverse distance on THz generation efficiency by solving the governing equations under different situations. Results indicate that adjusting plasma density to create ripples improves phase-matching conditions and nonlinear interactions, thereby enhancing energy conversion efficiency, with ripple amplitudes and periodicity necessitating meticulous calibration to prevent adverse consequences. Enhanced plasma density augments efficiency by reinforcing coupling and phase-matching, whereas elevated collisional frequencies attenuate nonlinear processes through energy dissipation, hence diminishing efficiency. The transverse distance influences laser intensity and spatial overlap, with efficiency reaching its maximum at the high-intensity core of the Gaussian beam. These findings underscore the necessity of meticulous regulation of plasma conditions to optimize THz production efficiency in practical applications.