Nathala Chandra S R, Ajami Ali, Ionin Andrey A, Kudryashov Sergey I, Makarov Sergey V, Ganz Thomas, Assion Andreas, Husinsky Wolfgang
Opt Express. 2015 Mar 9;23(5):5915-29. doi: 10.1364/OE.23.005915.
In this work the formation of laser-induced periodic surface structures (LIPSS) on a titanium surface upon irradiation by linearly polarized femtosecond (fs) laser pulses with a repetition rate of 1 kHz in air environment was studied experimentally. In particular, the dependence of high-spatial-frequency-LIPSS (HSFL) characteristics on various laser parameters: fluence, pulse number, wavelength (800 nm and 400 nm), pulse duration (10 fs - 550 fs), and polarization was studied in detail. In comparison with low-spatial-frequency-LIPSS (LSFL), the HSFL emerge at a much lower fluence with orientation perpendicular to the ridges of the LSFL. It was observed that these two types of LIPSS demonstrate different fluence, shot number and wavelength dependencies, which suggest their origin is different. Therefore, the HSFL formation mechanism cannot be described by the widely accepted interference model developed for describing LSFL formation.
在这项工作中，实验研究了在空气环境中，用重复频率为1 kHz的线偏振飞秒（fs）激光脉冲照射钛表面时激光诱导周期性表面结构（LIPSS）的形成。特别详细研究了高空间频率LIPSS（HSFL）特性对各种激光参数的依赖性：能量密度、脉冲数、波长（800 nm和400 nm）、脉冲持续时间（10 fs - 550 fs）以及偏振。与低空间频率LIPSS（LSFL）相比，HSFL在低得多的能量密度下出现，其取向垂直于LSFL的脊。观察到这两种类型的LIPSS表现出不同的能量密度、脉冲数和波长依赖性，这表明它们的起源不同。因此，HSFL的形成机制不能用为描述LSFL形成而广泛接受的干涉模型来描述。
