Xia Chuansheng, Huang Chaoyang, Zhang He, Xu Wenxiong, Zhang Jinying, Gu Bing, Li Yuanyuan, Xu Hua, Xu Chunxiang, Cui Qiannan
School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
State Key Laboratory of Electrical Insulation and Power Equipment, Center of Nanomaterials for Renewable Energy (CNRE), School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
Nanoscale. 2024 Jun 20;16(24):11663-11668. doi: 10.1039/d4nr01337a.
We demonstrate that layered violet phosphorus, an emerging 2D semiconductor, undergoes strong anisotropic third-harmonic generation (THG). Polarization dependence of in-plane THG presents a cruciate-flower-shaped curve. Through theoretical modeling of the in-plane THG response, done by considering crystalline symmetry of violet phosphorus, we successfully quantify four non-zero third-order nonlinear optical susceptibility tensor elements. From control experiments, the magnitude of third-order nonlinear optical susceptibility || is calculated to be about 4.0 × 10 m V, which is comparable to those of conventional 2D layered semiconductors. These results indicate that the layered violet phosphorus can serve as an ideal building block for nonlinear optical applications.
我们证明，新兴的二维半导体层状紫磷会经历强烈的各向异性三次谐波产生（THG）。面内THG的偏振依赖性呈现出十字花形曲线。通过考虑紫磷的晶体对称性对面内THG响应进行理论建模，我们成功地量化了四个非零的三阶非线性光学极化率张量元素。通过对照实验，计算出三阶非线性光学极化率||的大小约为4.0×10 m V，这与传统二维层状半导体的相当。这些结果表明，层状紫磷可作为非线性光学应用的理想构建块。
