Femtosecond Laser Printing of Single Ge and SiGe Nanoparticles with Electric and Magnetic Optical Resonances
Femtosecond Laser Printing of Single Ge and SiGe Nanoparticles with Electric and Magnetic Optical Resonances
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DOI：
10.1021/acsphotonics.7b01275
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发表时间：
2018-03-01
期刊：
影响因子：
7
通讯作者：
Chichkov, Boris N.
中科院分区：
文献类型：
--
作者：
Zhigunov, Denis M.;Evlyukhin, Andrey B.;Chichkov, Boris N.
最近推出的飞秒激光打印技术进一步发展用于制造晶体单Ge和SiGe纳米粒子（NP）。通过电子束蒸发在透明基板上沉积的非晶Ge和SiGe薄膜被用作供体。所开发的方法基于激光诱导的正向传输过程，该过程为不同类型的接收基板上的 NP 控制定位提供了机会。生成的纳米粒子的尺寸可以在约 100 至 300 nm 之间变化，具体取决于激光脉冲能量和波长。纳米颗粒的结晶度和组成均通过拉曼光谱测量得到证实。发现单个纳米粒子的实验可见散射光谱与基于米氏理论进行的理论模拟非常吻合。结果表明，Ge 和 SiGe 纳米粒子在可见光和近红外光谱范围内具有电偶极子共振和磁偶极子共振的特征，这在光子应用中具有广阔的前景。
A recently introduced femtosecond laser printing technique was further developed for the fabrication of crystalline single Ge and SiGe nanoparticles (NPs). Amorphous Ge and SiGe thin films deposited by e-beam evaporation on a transparent substrate were used as donors. The developed approach is based on a laser-induced forward transfer process, which provides an opportunity for NP controlled positioning on different types of receiver substrates. The size of the generated nanoparticles can be varied from about 100 to 300 nm depending on the laser pulse energy and wavelength. The crystallinity and composition of nanoparticles are both confirmed by the Raman spectroscopy measurements. The experimental visible scattering spectra of single nanoparticles are found to be well coincident with theoretical simulations performed on the basis of Mie theory. It is demonstrated that Ge and SiGe nanoparticles are characterized by electric and magnetic dipole resonances in the visible and near-infrared spectral ranges, which is promising for photonic applications.