Venkatesh Mottamchetty, Ganeev Rashid A, Ivanov Dmitry S, Boltaev Ganjaboy S, Kim Vyacheslav V, Liang Jingguang, Samokhvalov Andrey A, Kabashin Andrei V, Klimentov Sergey M, Garcia Martin E, Guo Chunlei
The Guo Photonics Laboratory, State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
Department of Physics, American University of Sharjah, 26666 Sharjah, UAE.
Nanomaterials (Basel). 2020 Jan 29;10(2):234. doi: 10.3390/nano10020234.
Gold nanoparticles (NPs) have a wide range of applications in various fields. Here, we present high-order nonlinear optical studies of the plasmas produced from ablation of Au bulk targets and Au NP films deposited on paper and glass substrates. Experimentally, we analyze high-order harmonic generation (HHG) from gold NPs-containing plasmas. The HHG is produced by 35-fs pulses at 800 and 400 nm, while the plasmas are produced by femtosecond (35 fs, 800 nm), picosecond (200 ps, 800 nm), and nanosecond (5 ns, 1064 nm) pulses, respectively. High-order harmonics produced from ablated Au NPs on paper were 40 times stronger than the HHG from that ablated from the Au bulk targets. Through molecular dynamic simulations, we investigate the formation of gold NPs during laser ablation of a metal surface under different conditions.
金纳米颗粒（NPs）在各个领域有着广泛的应用。在此，我们展示了对由块状金靶以及沉积在纸张和玻璃基板上的金纳米颗粒薄膜烧蚀产生的等离子体进行的高阶非线性光学研究。在实验中，我们分析了含金纳米颗粒等离子体产生的高次谐波产生（HHG）。高次谐波由800纳米和400纳米的35飞秒脉冲产生，而等离子体分别由飞秒（35飞秒，800纳米）、皮秒（200皮秒，800纳米）和纳秒（5纳秒，1064纳米）脉冲产生。纸张上烧蚀的金纳米颗粒产生的高次谐波比块状金靶烧蚀产生的高次谐波强40倍。通过分子动力学模拟，我们研究了在不同条件下金属表面激光烧蚀过程中金纳米颗粒的形成。
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