陈智慧

讲师 硕士生导师

入职时间:2020-05-26

所在单位:物理学院

学历:博士研究生毕业

办公地点:中南大学 新校区 物理楼 440B

性别:女

联系方式:czh_nlo@csu.edu.cn

学位:博士学位

在职信息:在职

毕业院校:新加坡国立大学

曾获荣誉:

2021-12-18  当选:  湖南省光学科技进展奖 二等奖

2020-06-09  当选:  Singapore National Institute of Chemistry (SNIC) Gold Medal awarded to the most outstanding PhD thesis

2018-08-07  当选:  Best Poster Award of the Chemistry Graduate Symposium 2018 of National University of Singapore

   
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Observation of Anisotropic Second Harmonic Generation in Two-Dimensional Niobium Diselenide

发布时间:2024-05-06

点击次数:

DOI码:10.1021/acs.jpclett.4c00923

所属单位:中南大学

发表刊物:J. Phys. Chem. Lett.

摘要:The intrinsic anisotropy of NbSe2 provides a favorable prerequisite of second harmonic generation (SHG) and rich possibilities for tailoring its nonlinear optical (NLO) properties. Here we report the highly efficient SHG of mechanically exfoliated NbSe2 flakes. The nonlinear optical response changes with excitation wavelengths, layer thicknesses, and polarizations of the excitation laser. The anisotropic SHG response further exhibits the intrinsic non-centrosymmetric crystal structure and could effectively assign the crystalline orientation of NbSe2 flakes. Interestingly, although NbSe2 flakes with tens of nanometers thickness experience attenuations in SHG performance, more efficient SHG anisotropy ratios were obtained, which are around 4 times higher than that of the 5-layer counterpart. The determined second-order nonlinearities of NbSe2 flakes (monolayer: ∼1.0 × 103 pm/V; 3-layer: ∼73 pm/V) are comparable to those of the commonly reported two-dimensional materials (e.g., MoS2, WSe2, graphene) with the same number of layers and much higher than those of commercial nonlinear optical crystals.

合写作者:Menglong Zhu, Defeng Xu, Guo Xiao, Asad Ahmed, Fangping Ouyang, Han Huang, Si Xiao

第一作者:kasha Younus, Yu zhou

论文类型:期刊论文

通讯作者:Zhihui Chen*, Jun He*

学科门类:理学

文献类型:J

期号:19

页面范围:4992–4999

是否译文:

发表时间:2024-05-02

收录刊物:SCI

发布期刊链接:https://pubs.acs.org/doi/10.1021/acs.jpclett.4c00923

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