2021年7月22日 · We report strong second-harmonic generation (SHG) from 2H polytype of multilayer Tin diselenide (SnSe 2) for fundamental excitation close to the indirect band-edge in the absence of excitonic...

2024年12月30日 · Herein, we proposed a substrate-guided growth mechanism to atomically fabricate AB′-stacked SnSe 2 superlattices, containing alternating SnSe 2 slabs with periodic interlayer mirror and gliding...

2023年11月7日 · Here, we utilize four-dimensional scanning transmission electron microscopy (4D-STEM) to simultaneously probe the in-plane strain and out-of-plane stacking in vdW SnSe. Specifically, we observe...

2017年7月3日 · Using first-principles electronic structure theory, here we predict giant second harmonic generation (SHG) in recently discovered two-dimensional (2D) ferroelectric–ferroelastic multiferroics–group IV monochalcogenides (i.e., GeSe, GeS, SnSe, and SnS).

2024年12月15日 · Thus, SnSe 2 possesses the essential prerequisites for growing twisted multilayer structures and influencing Moiré ferroelectricity. In this study, multilayer tin selenide (SnSe 2) was grown using CVD, with the introduction of Moiré twist structures. Both types of twist structures (screw twist and layered twist) exhibited significant ...

2024年10月9日 · 谐波是一种n个光子同时与材料相互作用并转换为一个光子的非线性光学过程。 二次谐波（second harmonic generation，SHG，两个光子变成一个光子）和三次谐波（third harmonic generation ，THG，三个光子变成一个光…

This study focuses on investigating the second-harmonic generation (SHG) in a five-layer SnSe sample, fabricated via mechanical exfoliation onto a PDMS substrate with controlled uniaxial strain. The SHG polar patterns exhibit noticeable variations in intensity as the applied strain on PDMS, with SnSe atop.

2022年5月25日 · SrZnSnSe 4 crystallizes a two-dimensional layered structure with nearly parallel alignment of anionic groups [ZnSe 4] and [SnSe 4]. The experimental results show that the second harmonic generation (SHG) is about 5 times of AgGaS 2, and the band gap of SrZnSnSe 4 is 1.82 eV by direct measured method.

2022年2月26日 · 更有趣的是，1T-SnSe 2保留的反演对称结构中揭示了明显的二次谐波产生（SHG），其强度与从单层到多层的厚度呈线性相关。 本文报道的新发现将为原子级薄 SnSe 2晶体的厚度可调生长及其在非线性光学中的独特光学特性探索和应用铺平道路。

We report strong second-harmonic generation (SHG) from 2H polytype of multilayer Tin diselenide (SnSe 2) for fundamental excitation close to the indirect band-edge in the absence of excitonic resonances.