Scholarlink

<p>We perform the self-consistent three-dimensional modelling of dense plasma formation and self organization under the tightly focused IR femtosecond laser pulse exposure in the volume of fused silica. The model is based on the joint integration of the second order wave equation in the cylindrical geometry and the rate equation for the density of charge carriers in the conduction band. Both field and electron impact ionization are taken into account. It is shown that dense plasma burst appearing near the focal plane causes effective scattering and reflection of the laser pulse. Coherent interference of the incident and scattered laser wave leads to the areas of intense field ionization producing the periodic plasma nanostructures both in <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="339_2024_8192_Article_IEq1.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="13" /> </InlineMediaObject> <EquationSource Format="TEX">\(\:\rho\:\)</EquationSource> </InlineEquation>- and z- directions. Similar divergent subwavelength structures of material modification regions were observed in recent experiments carried out under the similar laser pulse focusing conditions.</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

The role of interference effects in volumetric self-organization of plasma in transparent dielectrics under the tightly focused laser radiation exposure

  • 期刊论文

  • 发表日期：

    2025年1月6日

查看全文
  • A. V. Bogatskaya,
  • E. A. Volkova,
  • A. M. Popov

摘要

We perform the self-consistent three-dimensional modelling of dense plasma formation and self organization under the tightly focused IR femtosecond laser pulse exposure in the volume of fused silica. The model is based on the joint integration of the second order wave equation in the cylindrical geometry and the rate equation for the density of charge carriers in the conduction band. Both field and electron impact ionization are taken into account. It is shown that dense plasma burst appearing near the focal plane causes effective scattering and reflection of the laser pulse. Coherent interference of the incident and scattered laser wave leads to the areas of intense field ionization producing the periodic plasma nanostructures both in \(\:\rho\:\) - and z- directions. Similar divergent subwavelength structures of material modification regions were observed in recent experiments carried out under the similar laser pulse focusing conditions.