Ablation phenomena by intense terahertz vortex beam
Ablation phenomena by intense terahertz vortex beam
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强太赫兹涡旋光束的烧蚀现象
DOI：
10.1007/s00339-022-05970-7
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
Nakajima Makoto
中科院分区：
文献类型：
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作者：
Wang You Wei;Segawa Sadashi;Shimizu Tomoki;Agulto Verdad C.;Mag-usara Valynn Katrine;Kato Kosaku;Miyamoto Katsuhiko;Omatsu Takashige;Makino Kotaro;Tominaga Junji;Isoyama Goro;Asakawa Makoto;Nakajima Makoto
我们成功地利用太赫兹自由电子激光入射到螺旋相板（SPP）上产生了高效的太赫兹（THz）涡旋光束。实验证明了太赫兹涡旋光束对相变材料ge2sb2te5和GeTe/Sb2Te3的激光烧蚀作用。烧蚀痕迹表现为环形空间形态和激光诱导的周期性表面结构（LIPSS）模式。这些观测结果可以归因于太赫兹涡旋的扭矩。
We have successfully generated a highly efficient terahertz (THz) vortex beam using a THz free-electron laser incident to a spiral phase plate (SPP). The singularity at the center is apparently observed in the image of the transmitted beam after the SPP. We demonstrate the THz vortex beam-induced laser ablation on phase change materials, Ge2Sb2Te5and GeTe/Sb2Te3. The ablation marks show an annular spatial form and modulated laser-induced periodic surface structures (LIPSS) pattern. These observations can be attributed to the torque of the THz vortex.