Efficient and Anisotropic Second Harmonic Generation in Few-layer SnS Film

Release time:2021-08-01

Impact Factor:9.926

DOI number:10.1002/adom.202101200

Affiliation of Author(s):Central South Univertity

Journal:Advanced Optical Materials

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.

Co-author:Mianzeng Zhong, Xiao Guo, Yongsong Wang, Zhihui Chen*, Han Huang, Jun He, Chenliang Su, Kainping Loh

First Author:Menglong Zhu

Indexed by:Journal paper

Discipline:Natural Science

Document Type:J

Translation or Not:no

Date of Publication:2021-09-02

Included Journals:SCI

Links to published journals:https://onlinelibrary.wiley.com/doi/10.1002/adom.202101200