Abstract
Quantum interference (QuI) effect is a powerful method to generate and control the ultrafast photocurrent in semiconductors. We utilize two-color pulsed light excitation in bismuth sulfide (Bi2S3) film to induce the photocurrent through the QuI effect. Experimentally, the photocurrent is indirectly monitored using a standard terahertz (THz) time-domain spectroscopic system. Due to the QuI, an asymmetric photon injection occurs in Bi2S3 film, resulting in coherent injection current and subsequently THz wave generation. Our results on the pump pulse energy dependence of the THz electric field suggests that the THz wave generation process follows the third-order nonlinear optical process.
© 2022 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Yizhu Zhang, Zhi-Hong Jiao, Tao He, Jingjing Zhao, Xingwang Fan, Taotao Chen, Guo-Li Wang, Tian-Min Yan, Xiao-Xin Zhou, and Yuhai Jiang
Opt. Lett. 47(15) 3816-3819 (2022)
Zhihang Guo, Junzi Li, Tai Luo, Yanyan Cui, Changshun Wang, and Tingchao He
Opt. Lett. 47(21) 5573-5576 (2022)
R. G. Zonov, G. M. Mikheev, A. N. Obraztsov, and Yu. P. Svirko
Opt. Lett. 45(7) 2022-2025 (2020)