Nonlinear Optical Imaging of In‐Plane Anisotropy in Two‐Dimensional SnS
TLDR
In this paper , a nonlinear imaging of the in-plane anisotropic response of 2D tin(II) sulfide (SnS) crystals is presented, where the authors exploit the lack of inversion symmetry of the 2D SnS crystal that produces second harmonic generation (SHG) to perform polarization-resolved SHG (P-SHG).Abstract:
Two-dimensional (2D) tin(II) sulfide (SnS) crystals belong to a class of orthorhombic semiconducting materials with remarkable properties, such as in-plane anisotropic optical and electronic response, and multiferroic nature. The 2D SnS crystals exhibit anisotropic response along the in-plane armchair (AC) and zigzag (ZZ) crystallographic directions, offering an additional degree of freedom in manipulating their behavior. Here, advantage of the lack of inversion symmetry of the 2D SnS crystal, that produces second harmonic generation (SHG), is taken to perform polarization-resolved SHG (P-SHG) nonlinear imaging of the in-plane anisotropy. The P-SHG experimental data are fitted with a nonlinear optics model, allowing to calculate the AC/ZZ orientation from every point of the 2D crystal and to map with high resolution the AC/ZZ direction of several 2D SnS flakes belonging in the same field of view. It is found that the P-SHG intensity polar patterns are associated with the crystallographic axes of the flakes and with the relative strength of the second-order nonlinear susceptibility tensor in different directions. Therefore, the method provides quantitative information of the optical in-plane anisotropy of orthorhombic 2D crystals, offering great promise for performance characterization during device operation in the emerging optoelectronic applications of such crystals. read more
Citations
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Journal ArticleDOI
Liquid Phase Isolation of SnS Monolayers with Enhanced Optoelectronic Properties
Abdus Salam Sarkar,Ioannis Konidakis,E. Gagaoudakis,George Miltos Maragkakis,Sotiris Psilodimitrakopoulos,D. Katerinopoulou,Lambrini Sygellou,George Deligeorgis,Vassilios Binas,Ilias M. Oikonomou,Ph. Komninou,George Kiriakidis,George Kioseoglou,Emmanuel Stratakis +13 more
TL;DR: In this paper , a liquid phase exfoliation approach was proposed to overcome the strong interlayer binding energy of tin (II) sulfide (SnS) and other metal monochalcogenides (MMCs).
Journal ArticleDOI
Dynamical Response of Nonlinear Optical Anisotropy in a Tin Sulfide Crystal under Ultrafast Photoexcitation.
Kaiwen Sun,Hong Ma,Wei Xia,Pengfei Suo,Wenjie Zhang,Y. Zou,Xian Lin,Saifeng Zhang,Yan-Dong Guo,Guohong Ma +9 more
TL;DR: In this paper , the azimuthal angle dependence of nonlinear optical anisotropy in SnS was investigated by using ultrafast two-color pump and probe spectroscopy.
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