Scholarlink

Abstract <p>Laser-plasma interaction-based terahertz (THz) radiation sources are being actively studied due to their tunability and large output potential. In this research, we analyze the theoretical study of THz wave generation driven by two radially polarized q-Gaussian laser beams propagating through a slanting density collisional plasma. A model is formulated to study the effect of plasma density gradient on the nonlinear ponderomotive force. This force is responsible for creating nonlinear current density that emits THz. Factors such as variation in plasma density, density gradient (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\({{n}_{r}}\)</EquationSource> <!--DANPhys2660008Kokila-m1--> </InlineEquation>), background plasma density (<InlineEquation ID="IEq2"> <EquationSource Format="TEX">\({{n}_{0}}\)</EquationSource> <!--DANPhys2660008Kokila-m2--> </InlineEquation>), beam radial position (<InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(r\)</EquationSource> <!--DANPhys2660008Kokila-m3--> </InlineEquation>), electron neutral collision frequency (<InlineEquation ID="IEq4"> <EquationSource Format="TEX">\({{\nu }_{{{\text{en}}}}}\)</EquationSource> <!--DANPhys2660008Kokila-m4--> </InlineEquation>) and the q-parameter have been included in the model. A comparison analysis, along with 3D graphical results, indicates that the output of THz enhances in case of positive density gradient but the q-parameter govern the field amplitude. According to these findings, the adjustment of plasma density profile and beam structure allows higher quality and tunable THz generation. The findings provide valuable guidance to developing plasma-based THz sources with efficient and structured plasma waveguides.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Terahertz Generation in Collisional Plasma: A Comparative Study of Slanted Density Profiles Using Radially Polarized q-Gaussian Laser Beams

  • 期刊论文

  • 发表日期：

    2026年2月1日

查看全文
  • Himani Kokila,
  • Vivek Sharma,
  • Vishal Thakur

摘要

Abstract

Laser-plasma interaction-based terahertz (THz) radiation sources are being actively studied due to their tunability and large output potential. In this research, we analyze the theoretical study of THz wave generation driven by two radially polarized q-Gaussian laser beams propagating through a slanting density collisional plasma. A model is formulated to study the effect of plasma density gradient on the nonlinear ponderomotive force. This force is responsible for creating nonlinear current density that emits THz. Factors such as variation in plasma density, density gradient ( \({{n}_{r}}\) ), background plasma density ( \({{n}_{0}}\) ), beam radial position ( \(r\) ), electron neutral collision frequency ( \({{\nu }_{{{\text{en}}}}}\) ) and the q-parameter have been included in the model. A comparison analysis, along with 3D graphical results, indicates that the output of THz enhances in case of positive density gradient but the q-parameter govern the field amplitude. According to these findings, the adjustment of plasma density profile and beam structure allows higher quality and tunable THz generation. The findings provide valuable guidance to developing plasma-based THz sources with efficient and structured plasma waveguides.