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Noble-metal nanoparticles and short pulses for nanomanipulations: Theoretical analysis

机译:贵金属纳米粒子和用于纳米操作的短脉冲:理论分析

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The rapid temperature change and the near-field enhancement resulting from resonant interactions between short laser pulses and noble-metal nanoparticles could be utilized for precise manipulations of matter on a nanometric scale. Here, we present a theoretical study of the relative effects of various experimental parameters, including pulse duration, irradiance, and wavelength, and a particle's substance, size, and shape. We show that spatially confined, local nanometric interactions between a particle and its near surroundings are feasible using 50 nm gold and silver nanospheres illuminated by laser pulses shorter than 70 fs and 90 fs, respectively, with no particle melting and minimal collateral damage. The results of this work could be useful for researchers in various fields, who aim at manipulating matter on the smallest possible scales, with high specificity and accuracy.
机译:由短激光脉冲与贵金属纳米颗粒之间的共振相互作用引起的快速温度变化和近场增强可用于纳米级物质的精确处理。在这里,我们对各种实验参数(包括脉冲持续时间,辐照度和波长,以及粒子的物质,大小和形状)的相对影响进行了理论研究。我们表明,使用50 nm金和银纳米球分别通过短于70 fs和90 fs的激光脉冲照射,且没有颗粒熔化和最小的附带损害,在颗粒与其附近环境之间的空间受限的局部纳米相互作用是可行的。这项工作的结果可能对各个领域的研究人员有用,他们致力于以最小的规模,高度的特异性和准确性来操纵物质。

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