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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Effect of ambient gas conditions on laser-induced copper plasma and surface morphology
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Effect of ambient gas conditions on laser-induced copper plasma and surface morphology

机译：环境气体条件对激光诱导的铜等离子体和表面形态的影响

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摘要

The effect of different gases and their pressures on the intensity of spectral emission, electron temperature and density of laser-produced plasma has been investigated. For this purpose, Cu targets were ablated by employing Q-switched Nd:YAG laser pulses (λ～1064 nm, τ～10 ns, pulsed energy of 200 mJ) under various filling pressures of the background gases argon, air and helium. The optical emission spectroscopy of Cu plasma has been studied using the laser-induced breakdown spectroscopy system. The results obtained strongly indicate that the nature and pressure of the ambient atmosphere are one of the controlling factors of the plasma characteristics. A scanning electron microscopy analysis has been performed to investigate the dependence of surface morphological changes of an irradiated target on the nature and pressure of an ambient gas. The basic aim of this study is to improve the understanding of ablation mechanisms and plasma parameters (optical emission intensity, electron temperature and density) under various ambient conditions. The optimization of experimental conditions (the nature and pressure of the ambient environment) is very important for temperatures and densities of ablated species, which are consequently crucial for pulsed laser deposition of thin films and nanostructuring of materials.
机译：研究了不同气体及其压力对光谱发射强度，电子温度和激光产生等离子体密度的影响。为此，在不同的背景气体氩气，空气和氦气填充压力下，通过调Q开关Nd：YAG激光脉冲（λ〜1064 nm，τ〜10 ns，脉冲能量为200 mJ）烧蚀Cu靶。已经使用激光诱导击穿光谱系统研究了Cu等离子体的光发射光谱。获得的结果有力地表明，环境气氛的性质和压力是等离子体特性的控制因素之一。已经进行了扫描电子显微镜分析以研究被照射靶的表面形态变化对环境气体的性质和压力的依赖性。这项研究的基本目的是增进对各种环境条件下的烧蚀机理和等离子体参数（光发射强度，电子温度和密度）的了解。实验条件的优化（周围环境的性质和压力）对于烧蚀物质的温度和密度非常重要，因此对于脉冲激光沉积薄膜和材料的纳米结构至关重要。

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