二次谐波产生
材料科学
铁电性
多铁性
二次谐波成像显微术
非线性光学
各向异性
极化(电化学)
非线性光学
分子束外延
光电子学
光学
图层(电子)
高次谐波产生
超短脉冲
铋铁氧体
光谱学
非线性系统
外延
纳米技术
激光器
电介质
物理
量子力学
物理化学
化学
作者
Menglong Zhu,Mianzeng Zhong,Xiao Guo,Yongsong Wang,Zhihui Chen,Han Huang,Jun He,Chenliang Su,Kian Ping Loh
标识
DOI:10.1002/adom.202101200
摘要
Abstract Group‐IV monochalcogenide ferroelectric materials possess fascinating nonlinear optical properties and electro‐optical effects which play a vital role in 2D ferroelectrics, multiferroics and nonlinear optoelectronics. However, the studies of nonlinear optical properties of group‐IV monochalcogenides are still in their infancy stage. Herein, the preparation of few‐layer SnS by the molecular beam epitaxy (MBE) method is reported and the efficient second harmonic generation (SHG) of SnS monochalcogenide is systematically scrutinized by using ultrafast nonlinear optical spectroscopy. The obtained thickness‐dependent SHG is highly related with the coherence length. Second‐order nonlinear susceptibility of few‐layer SnS is also obtained. Polarization‐dependent SHG studies reveal its intrinsic anisotropy pattern and can be utilized to identify the crystalline orientation of few‐layer SnS film.
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