In the pursuit of efficient and robust optical field transmission in modern photonics, complex environments such as atmospheric turbulence and underwater scattering have long been a persistent constraint that traditional laser beams struggle to overcome.

With the rapid development of nanophotonics, nonreciprocal devices have expanded from classical information-photonic components such as optical isolators and circulators to the realm of thermal radiation. This expansion is important because nonreciprocity provides a key physical route to breakthrough the classical Kirchhoff constraint—that spectral directional absorptivity equals emissivity at the same frequency and angle—thereby opening new opportunities for thermal-radiation control and emerging photonic energy technologies.

At the invitation of the founding editor-in-chief of Photonics Insights, Professor Wang Pengfei's team from Northeast Normal University authored a review paper titled " Mid-IR fluoride fibers: materials, fabrication, and fiber laser applications " which was published in the three issue of Photonics Insights, 2025. (Shunbin Wang, Shijie Jia, Yiguang Jiang, Long Zhang, Pengfei Wang, Yichun Liu. Mid-IR fluoride fibers: materials, fabrication, and fiber laser applications[J]. Photonics Insights, 2025, 4(3): R07)

Non-Hermitian physics, as a framework for studying open systems, has achieved remarkable progress in both theoretical exploration and experimental implementation in recent years. Non-Hermitian systems exhibit many unique phenomena, such as the non-Hermitian skin effect, novel topological phases, and exceptional points. In experimental studies of non-Hermitian systems, photonic platforms have emerged as ideal testbeds due to their flexible controllability and scalability. Non-Hermitian photonics not only reveals intriguing physical effects but also provides new pathways for optical field manipulation and quantum information processing.