Ultrafast dynamics in strong - field interactions with molecules and solid surfaces - High-harmonic generation and nanostructuring -
Ultrafast dynamics in strong - field interactions with molecules and solid surfaces - High-harmonic generation and nanostructuring -
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强场相互作用中的超快动力学与分子和固体表面-高次谐波产生和纳米结构-
DOI：
10.1117/12.881821
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
G.Miyaji and K.Yoshii
中科院分区：
文献类型：
--
作者：
K.Miyazaki;G.Miyaji and K.Yoshii
本文介绍了我们最近在超快强场与原子、分子和固体表面相互作用方面的两个研究课题。第一个是在泵浦和探测实验中，研究了飞秒激光脉冲作用下分子非相干排列产生的高次谐波。HHG对分子轨道及其相对于激光偏振的空间取向非常敏感。实验和理论研究证明了相干旋转分子产生的高次谐波的特性。另一个主题是在飞秒激光烧蚀介电材料中观察到的周期性纳米结构的形成。主要的兴趣是在固体表面上的纳米结构的超快相互作用过程中，飞秒激光器的纳米加工的潜在应用的目的。实验结果表明，增强的近场引发烧蚀的表面积远小于激光波长和纳米周期性的起源可以归因于表面层中的表面等离子体激元的激发。
This paper describes two topics of our recent studies on ultrafast strong-field interactions with atoms, molecules and solid surfaces. One is concerned with the high-order harmonic generation (HHG) from molecules nonadiabatically aligned with intense femtosecond (fs) laser pulses in a pump and probe experiment. The HHG is very sensitive to the molecular orbital and its spatial orientation with respect to the laser polarization. Experimental and theoretical studies demonstrate the characteristic properties of HHG from coherently rotating molecules. The other topic is the periodic nanostructure formation observed in fs laser ablation of dielectric materials. The major interest is in the ultrafast interaction process of nanostructuring on solid surfaces, for the purposes of potential applications of fs lasers to nanoprocessing. The experimental results have shown that enhanced near-field initiates the ablation of surface area much smaller than the laser wavelength and the origin of nanoscale periodicity can be attributed to the excitation of surface plasmon polaritons in the surface layer.