论文标题
来自旋转的黑暗激子的径向极化光束和单层中的Trions WSE $ _2 $
Radially polarized light beams from spin-forbidden dark excitons and trions in monolayer WSe$_2$
论文作者
论文摘要
过渡金属二甲基元素单层（TMD-MLS）的丰富光学特性使这些材料有望为新的光电设备设计。尽管TMD-ML中有大量的激子复合物，但主要的焦点还是放在光学明亮的中性激子上。为了基础科学目的而言，已经针对旋转的深色激发型复合物，但不是出于应用。我们报告了ML WSE $ _2 $中的自旋 - 孔的深色激子复合物，是轻松生成径向极化光束的理想系统。此外，可以利用光致发光束的空间分辨极化，以在二维材料中对激子进行基础研究。
The rich optical properties of transition metal dichalcogenide monolayers (TMD-MLs) render these materials promising candidates for the design of new optoelectronic devices. Despite the large number of excitonic complexes in TMD-MLs, the main focus has been put on optically bright neutral excitons. Spin-forbidden dark excitonic complexes have been addressed for basic science purposes, but not for applications. We report on spin-forbidden dark excitonic complexes in ML WSe$_2$ as an ideal system for the facile generation of radially polarized light beams. Furthermore, the spatially resolved polarization of photoluminescence beams can be exploited for basic research on excitons in two-dimensional materials.
