At the invitation of the founding editor-in-chief of Photonics Insights, Prof. Sergey I. Bozhevolnyi and Associate Prof. Fei Ding from University of Southern Denmark authored a review paper titled "Electrically tunable optical metasurfaces" which was published in the Issue 3 of Photonics Insights, 2024. (Fei Ding, Chao Meng, Sergey I. Bozhevolnyi. Electrically tunable metasurfaces[J]. Photonics Insights, 2024, 3(3): R07)

Photoacoustic computed tomography (PACT) is an emerging biomedical imaging technology that has attracted substantial attention and interest. Recently, Prof. Chao Tian from the University of Science and Technology of China, in collaboration with Prof. Meng Yang from Peking Union Medical College Hospital, Prof. Jie Tian from the Institute of Automation, Chinese Academy of Sciences, and other leading experts in the field of photoacoustic imaging, jointly authored a full review article titled "Image reconstruction from photoacoustic projections", which was published in the Issue 3 of Photonics Insights, 2024. ( Chao Tian, Kang Shen, Wende Dong, et al. Image reconstruction from photoacoustic projections[J]. Photonics Insights, 2024, 3(3): R06)

Professor Din Ping Tsai from City University of Hong Kong and Professor Shumin Xiao from Harbin Institute of Technology (Shenzhen), jointly authored a review article titled "Advanced manufacturing of dielectric meta-devices". The article was published in the second issue of Photonics Insights in 2024. (Wenhong Yang, Junxiao Zhou, Din Ping Tsai, Shumin Xiao, "Advanced manufacturing of dielectric meta-devices," Photon. Insights 3, R04 (2024)).

Optical micro/nanofiber (MNF) is a kind of quasi one-dimensional (1D) free-standing optical waveguide with a diameter close to or less than the vacuum wavelength of the transmitted light. As shown in Fig. 1, the earliest report of glass MNFs with diameters around 1 μm could be traced back to 1887 when Boys fabricated glass threads by drawing molten minerals at a high speed. Owing to excellent elasticity and small resilience of these threads, they were used as elastic springs or suspension wire for measuring a very small force or torsion. Since the optical waveguiding theory had not yet been developed at that time, those threads were not used for optical waveguiding.