Authors: Zhen Lei, Jiawei Chang, Qiyi Zhao, Jian Zhou, Yuanyuan Huang, Qihua Xiong, Xinlong Xu
Published: 2025-02-14
Source: Full article
Nonvolatile control over the physical state of polar materials through all-optical methods has been a long-standing objective pursued in optoelectronics. Photoferroelectric semiconductors exhibit immense potential in capturing multimodal nonvolatile states, attributed to their spontaneous and reversible in-plane and out-of-plane polarizations. Herein, we uncover an unprecedented nonvolatile, zero-bias, ultrafast photocurrent hysteresis response with an innovative all-optical approach, discerned by analyzing in-plane and out-of-plane terahertz (THz) waves emitted from photoferroelectric α-In