Thermal near-field tuning of silicon Mie nanoparticles
Thermal near-field tuning of silicon Mie nanoparticles
复制标题
DOI：
10.1515/nanoph-2021-0424
复制
发表时间：
2021-11-01
期刊：
影响因子：
7.5
通讯作者：
Raza, Soren
中科院分区：
文献类型：
--
作者：
Assadillayev, Artyom;Hinamoto, Tatsuki;Raza, Soren
可调谐的高折射率纳米结构对于实现具有紧凑覆盖区的光子器件是高度期望的。通过利用硅中的大的热光效应，我们显示了在可见光范围内隔离的硅纳米球中Mie共振的远场和近场的可逆和宽的热调谐。我们进行原位加热的透射电子显微镜和电子能量损失谱显示，米氏共振加热时表现出较大的光谱位移。我们利用光谱的变化来证明不同的米氏共振之间的近场调谐。通过结合电子能量损失谱和能量色散X射线分析，我们显示了高达1073 K的温度下的单硅纳米球的可逆和稳定的操作。我们的研究结果表明，热驱动提供了动态近场调谐的米氏共振，这可能会打开应用在可调谐非线性光学，拉曼散射，和光发射。
: Tunable high-refractive-index nanostructures are highly desired for realizing photonic devices with a compact footprint. By harnessing the large thermo-optic effect in silicon, we show reversible and wide thermal tuning of both the far-and near-fields of Mie resonances in isolated silicon nanospheres in the visible range. We perform in situ heating in a transmission electron microscope and electron energy-loss spectroscopy to show that the Mie resonances exhibit large spectral shifts upon heating. We leverage the spectral shifts to demonstrate near-field tuning between different Mie resonances. By combining electron energy-loss spectroscopy with energy-dispersive X-ray analysis, we show a reversible and stable operation of single silicon nanospheres up to a temperature of 1073 K. Our results demonstrate that thermal actuation offers dynamic near-field tuning of Mie resonances, which may open up applications in tunable nonlinear optics, Raman scattering, and light emission.