Kim Vyacheslav V, Ganeev Rashid A, Rao Konda Srinivasa, Yu Weili, Li Wei
Opt Express. 2021 Oct 25;29(22):35877-35890. doi: 10.1364/OE.438075.
Nonlinear optical properties of carbon nanostructures attract attention due to the unique response of these materials during interactions with ultrashort laser pulses. Here we probe the carbon nanocomposites mixed with epoxy resin in laser-induced plasmas using the high-order harmonics generation (HHG) method. We analyze the nanosecond pulses induced plasmas containing three carbon nanostructures (fullerenes, multiwalled carbon nanotubes and diamond nanoparticles) using 40 fs pulses propagating through these plasmas. HHG efficiencies in ablated graphite and nanocomposites are compared. We utilize two digitally synchronized (nanosecond and femtosecond) laser sources allowing for the HHG-based analysis of the evolution of different plasma plumes up to 10 µs delay from the beginning of ablation. The role of different carbon-containing nanocomposites is analyzed and the evidence for the presence of various nanomaterials in laser-induced plasma at the moment of propagation of the driving femtosecond pulses is demonstrated.
碳纳米结构的非线性光学特性因其在与超短激光脉冲相互作用时的独特响应而备受关注。在此，我们使用高次谐波产生（HHG）方法，在激光诱导等离子体中探测与环氧树脂混合的碳纳米复合材料。我们使用传播通过这些等离子体的40飞秒脉冲，分析包含三种碳纳米结构（富勒烯、多壁碳纳米管和金刚石纳米颗粒）的纳秒脉冲诱导等离子体。比较了烧蚀石墨和纳米复合材料中的HHG效率。我们利用两个数字同步（纳秒和飞秒）激光源，对烧蚀开始后长达10微秒延迟的不同等离子体羽流的演化进行基于HHG的分析。分析了不同含碳纳米复合材料的作用，并证明了在驱动飞秒脉冲传播时刻激光诱导等离子体中存在各种纳米材料的证据。
