Layer-dependent exciton polarizability and the brightening of dark excitons in few-layer black phosphorus

• Published in: Nature communications Vol. 14; no. 1; pp. 5314 - 8
• Main Authors: Lei, Yuchen, Ma, Junwei, Luo, Jiaming, Huang, Shenyang, Yu, Boyang, Song, Chaoyu, Xing, Qiaoxia, Wang, Fanjie, Xie, Yuangang, Zhang, Jiasheng, Mu, Lei, Ma, Yixuan, Wang, Chong, Yan, Hugen
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 01.09.2023; Nature Publishing Group; Nature Portfolio
• Subjects: 639/301/1005/1007; 639/624; Brightening; Broadband; Emitters; Evolution; Excitons; Genetic screening; Humanities and Social Sciences; Lasers; Modulators; multidisciplinary; Optoelectronics; Phosphorus; Photoelectric effect; Photoelectric emission; Polarizability; Science; Science (multidisciplinary); Screening; Thickness

The evolution of excitons from 2D to 3D is of great importance in photo-physics, yet the layer-dependent exciton polarizability hasn’t been investigated in 2D semiconductors. Here, we determine the exciton polarizabilities for 3- to 11-layer black phosphorus—a direct bandgap semiconductor regardless...