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Generation and erasure of femtosecond laser-induced periodic surface structures on nanoparticle-covered silicon by a single laser pulse

机译:飞秒激光诱导的单个激光脉冲在纳米颗粒覆盖的硅上产生和消除周期性表面结构

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摘要

We experimentally show that the generation and erasure of femtosecond laser-induced periodic surface structures on nanoparticle-covered silicon inducted by irradiation with a single laser pulse (800 nm, 120 fs, linear polarization) depend on the pulse fluence. We propose that this is due to competition between periodic surface structuring originating from the interference of incident light with surface plasmon polaritons and surface smoothing associated with surface melting. Experimental results are supported by theoretical analysis of transient surface modifications based on combining the two-temperature model and the Drude model.
机译:我们的实验表明,飞秒激光诱导的周期表面结构在纳米粒子覆盖的硅上的产生和消除取决于单个激光脉冲(800 nm,120 fs,线性极化)的辐照。我们认为这是由于周期性的表面结构竞争所致,该周期性表面结构是由入射光对表面等离激元极化子的干扰引起的周期性表面结构化与与表面熔化相关的表面平滑化之间的竞争所致。通过结合两种温度模型和Drude模型对瞬态表面进行了理论分析,为实验结果提供了支持。

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