Anisotropy of Second-Harmonic Generation in SnSe Flakes with Ferroelectric Stacking
學年 113
學期 2
出版（發表）日期 2025-07-24
作品名稱 Anisotropy of Second-Harmonic Generation in SnSe Flakes with Ferroelectric Stacking
作品名稱（其他語言）
著者 Li-Tien Huang; Redhwan Moqbel; Chi Chen; Ming-Hao Lee; Chi-Cheng Lee; Nannan Mao; Tianyi Zhang; Yunyue Zhu; Jing Kong; Kung-Hsuan Lin
單位
出版者
著錄名稱、卷期、頁數 Advanced Photonics Research 6, 2500033
摘要 The second-harmonic generation (SHG) susceptibilities of few-layer SnSe with ferroelectric stacking are investigated using both experimental and theoretical approaches. Theoretical calculations predict a maximum bulk SHG susceptibility of 2444 pm V−1 at 1.2 eV, which is three orders of magnitude larger than that of typical nonlinear crystals. Experimentally, a maximum value of 1424 pm V−1 at 1.19 eV in close agreement with the theoretical prediction is measured. The anisotropic SHG patterns observed experimentally align with theoretical predictions based on the material's point group symmetry. The photon-energy dependence of SHG patterns is also measured within the range of 1.19 to 1.55 eV to explore the relative strengths of various SHG susceptibilities. Notably, the measured is significantly larger than the theoretical value of bulk AC-SnSe, likely due to the strain effects and the mixing of ferroelectric and antiferroelectric stacking configurations in the practical SnSe few-layer samples.
關鍵字
語言 en
ISSN 2699-9293
期刊性質 國外
收錄於 ESCI
產學合作
通訊作者
審稿制度 是
國別 DEU
公開徵稿
出版型式 ,電子版
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