1064nm纳秒脉冲激光辐照水下锗材料光谱研究
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摘要
为了研究水对激光辐照半导体锗材料的影响,利用1064nm纳秒脉冲激光辐照锗材料,改变激光能量与锗材料所处环境,对其散射光谱进行采集与分析。结果表明,作用在空气中锗材料表面单脉冲激光能量35mJ,产生较多等离子体谱线。作用在薄层水覆盖的锗材料表面单脉冲激光能量35mJ、50mJ、100mJ,锗材料特有等离子体谱线消失。作用在水下50mm锗材料表面单脉冲激光能量35mJ,采集散射谱线表现为辐射谱形式,所有等离子体谱线消失。等离子体谱线的差异代表了激光辐照锗材料的损伤机理与损伤效果存在差异。此结果对于激光水下加工半导体材料以及军事光电对抗方面有着重要应用前景。
In order to study the effect of water on semiconductor germanium materials irradiated by laser, 1064 nm nanosecond pulse laser was used to irradiate germanium materials, change the laser energy and the environment of germanium materials, and collect and analyze the scattering spectra of germanium materials. The results show that more plasma lines are produced when the monopulse laser energy is 35 MJ on the surface of germanium material in air. The monopulse laser energy 35 mJ, 50 mJ, 100 mJ on the surface of germanium material covered with thin layer of water, the unique plasma spectral line of germanium material disappears. When the monopulse laser energy is 35 MJ on the surface of underwater 50 mm germanium material, the collected scattering spectral lines are in the form of radiation spectrum, and all the plasma spectral lines disappear. The difference of plasma spectral lines represents the difference of damage mechanism and damage effect of germanium materials irradiated by laser. These results have important application prospects for laser underwater processing of semiconductor materials and military optoelectronic countermeasures.
In order to study the effect of water on semiconductor germanium materials irradiated by laser, 1064 nm nanosecond pulse laser was used to irradiate germanium materials, change the laser energy and the environment of germanium materials, and collect and analyze the scattering spectra of germanium materials. The results show that more plasma lines are produced when the monopulse laser energy is 35 MJ on the surface of germanium material in air. The monopulse laser energy 35 mJ, 50 mJ, 100 mJ on the surface of germanium material covered with thin layer of water, the unique plasma spectral line of germanium material disappears. When the monopulse laser energy is 35 MJ on the surface of underwater 50 mm germanium material, the collected scattering spectral lines are in the form of radiation spectrum, and all the plasma spectral lines disappear. The difference of plasma spectral lines represents the difference of damage mechanism and damage effect of germanium materials irradiated by laser. These results have important application prospects for laser underwater processing of semiconductor materials and military optoelectronic countermeasures.
引文
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[3]Bonse J,Bachelier G,Siegel J,et al.Time-and space-resolved dynamics of melting,ablation,and solidification phenomena induced by femtosecond laser pulses in germanium[J].Physical Review B Condensed Matter,2012,74(13):134106.
[4]张兴德,赵秀丽,程玉峰.锗在红外技术上的应用和发展趋势[J].稀有金属,1988(6):49-54.
[5]邓宇,郭钟宁,连海山,等.水下纳秒激光微孔加工实验研究[J].现代制造工程,2016(7):1-5.