Controlling the optoelectronic properties of semiconductors by an electric field is crucial for modern electronics, information processing, computing devices, and optical communication. The electrically switchable polarization feature of ferroelectrics offers the potential for manipulating light–matter interactions. Herein, we demonstrate the electrically switchable bipolar polarization-sensitive photodetection in a biaxial ferroelectric semiconductor (4,4-DFPD)₂PbI₄ (4,4-DFPD is 4,4-difluoropiperidinium). By altering the polarization direction via an electric field, we induce corresponding changes in the anisotropic photoresponse, which is driven by the bulk photovoltaic effect. Based on this phenomenon, we put forward an encrypted optical communication model defined by biaxial ferroelectrics and successfully implement the encryption/decryption transmission process of SOS signals. This work provides new insights into the electrical control of light–matter interactions and multiaxial ferroelectric optoelectronic applications.

中文翻译：

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基于双轴铁电半导体的电切换双极偏振敏感光检测


通过电场控制半导体的光电特性对于现代电子学、信息处理、计算设备和光通信至关重要。铁电体的电可切换极化特性为操纵光-物质相互作用提供了潜力。在此，我们展示了双轴铁电半导体 （4,4-DFPD）₂PbI₄（4,4-DFPD 是 4,4-二氟哌啶）中的电可切换双极化敏感光检测。通过电场改变极化方向，我们在体光伏效应的驱动下诱导各向异性光响应的相应变化。基于这一现象，我们提出了一种由双轴铁电体定义的加密光通信模型，并成功实现了 SOS 信号的加解密传输过程。这项工作为光-物质相互作用的电学控制和多轴铁电光电应用提供了新的见解。