PtS2 metamaterials: Fabrication and physical properties
PtS2 metamaterials: Fabrication and physical properties
复制标题
PtS2 超材料：制造和物理性能
DOI：
10.1016/j.apsusc.2022.156277
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发表时间：
2023-01-03
影响因子：
6.7
通讯作者：
Yang，Peng
中科院分区：
文献类型：
--
作者：
Yang，Wangfan;Lu，Jiangwei;Yang，Peng
超材料是具有工程亚波长结构的电磁材料，可以与入射电磁波耦合产生独特的物理性质。目前，由于过渡金属二硫属化物（TMD）独特的结构和新颖的物理性质，人们正在进行许多研究。在这里，我们通过成熟的纳米球光刻技术在少层 PtS2 上制备了各种尺寸的蜂窝纳米结构。通过这种方式，可以调整 PtS2 超材料的独特性质，以探索更奇特的物理特性。使用扫描电子显微镜和原子力显微镜展示了 PtS2 超材料的蜂窝状表面形貌。研究了Pt和PtS2超材料的光吸收光谱，结果表明，可以通过改变纳米结构的尺寸来调制吸收光谱。此外，通过角分辨吸收光谱表征了 Pt 和 PtS2 超材料的光学各向异性。拉曼光谱显示了 Pt 超材料的表面增强拉曼光谱 (SERS) 效应。模拟展示了 PtS2 超材料在不同波长下的电场分布。研究结果为开发基于 TMD 元结构的新型光电器件提供了一种新方法。
Metamaterials are electromagnetic materials with engineered sub-wavelength structures, which can be coupled with the incident electromagnetic wave to produced peculiar physical properties. Currently, many studies are being conducted to the transition metal dichalcogenides (TMDs) due to their unique structures and novel physical properties. Here, we produced honeycomb nanostructure with various sizes on few-layer PtS2through a well-developed nanosphere lithography technology. In this way, the unique properties of PtS2metamaterials can be tuned to explore more exotic physical characteristics. The honeycomb surface morphology of PtS2metamaterials has been demonstrated using the scanning electron microscope and the atomic force microscope. The optical absorption spectra of Pt and PtS2metamaterials were investigated and the results show that the absorption spectra can be modulated by changing the size of the nanostructure. In addition, the optical anisotropic properties of Pt and PtS2metamaterials were characterized through the angle-resolved absorption spectra. Raman spectroscopy shows the surface-enhanced Raman spectroscopy (SERS) effect of Pt metamaterials. The simulation exhibits the electric field distribution of PtS2metamaterials at different wavelengths. The results offer a new approach to develop novel optoelectronic devices based on the meta-structure of TMDs.