Resonant silicon nanoparticles with controllable crystalline states and nonlinear optical responses.
Resonant silicon nanoparticles with controllable crystalline states and nonlinear optical responses.
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DOI：
10.1039/c8nr02057d
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发表时间：
2018-06
期刊：
影响因子：
6.7
通讯作者：
S. Makarov;L. Kolotova;S. Starikov;U. Zywietz;B. Chichkov
中科院分区：
文献类型：
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作者：
S. Makarov;L. Kolotova;S. Starikov;U. Zywietz;B. Chichkov
共振硅纳米颗粒的高通量激光打印已经成为一种用于制造具有各种功能的深亚波长物体的新工具。共振硅纳米粒子的应用关键取决于其结晶状态。然而，在激光打印过程中控制晶体结构的方法仍然没有研究。在这里，我们演示，实验和理论上，如何通过激光打印技术制造的硅纳米粒子的晶体结构可以从几乎无定形到多晶状态。特别地，我们提出了一种通过改变辐照硅膜和接收衬底之间的距离来控制晶体结构的方法。这项研究允许二次谐波产生的最佳条件被揭示。我们相信所提出的方法为功能性纳米颗粒和纳米结构的完全可控激光打印打开了大门。
High-throughput laser printing of resonant silicon nanoparticles has emerged as a novel tool for the fabrication of deeply subwavelength objects with various functionalities. The applications of resonant silicon nanoparticles crucially depend on their crystalline state. However, the ways to control the crystalline structure during laser printing remain unstudied. Here we demonstrate, both experimentally and theoretically, how the crystalline structure of silicon nanoparticles fabricated by a laser printing technique can be varied from almost amorphous to a polycrystalline state. In particular, we propose a method of crystalline structure control via changing the distance between the irradiated silicon film and the receiving substrate. This study allows the most optimal conditions for second harmonic generation to be revealed. We believe that the proposed method opens the door to fully controllable laser printing of functional nanoparticles and nanostructures.