All Year All Light People: Professor Martin Booth spoke about adaptive optics and its applications Prof. Martin Booth, as one of the first people to explore the practical use of adaptive optics in microscopy, shares with us his valuable experience and insight Jiahe CuiChao HeWei Chang Light People Open Access 20 Oct 2022 Light People: Professor Guangming Tao Hui Wang Light People Open Access 19 Oct 2022 Light People: Professor Thomas G. Brown Prof. Thomas G. Brown from the University of Rochester introduced the term “cylindrical vector beam” to describe unique and unconventional polarization states. Hui Wang Light People Open Access 18 Oct 2022 Carbonized polymer dots enhanced stability and flexibility of quasi-2D perovskite photodetector Carbonized polymer dots effectively improved the stability and flexibility of perovskite photodetector by achieving no loss response after bending 10000 times and resolving a weak light of 10.1 pW cm−2 Mingrui TanMingbian LiBai Yang Article Open Access 18 Oct 2022 Color-selective three-dimensional polarization structures A single metasurface is used to generate multiple 3D knots with predesigned polarization profiles. At a given region, only a single 3D polarization knot can be obtained for a single color. Different 3D polarization knots can be obtained by changing the incident colors (left). The generated polarization structures are unveiled after passing through a linear polarizer (right). Yuttana IntaravanneRuoxing WangXianzhong Chen Article Open Access 17 Oct 2022 Symmetric private information retrieval supported by quantum-secure key-exchange network Shuang Wang News & Views Open Access 14 Oct 2022 Deep learning accelerates whole slide imaging for next-generation digital pathology applications Yair RivensonAydogan Ozcan News & Views Open Access 14 Oct 2022 Electrically pumped quantum-dot lasers grown on 300 mm patterned Si photonic wafers Chen ShangKaiyin FengJohn E. Bowers Article Open Access 14 Oct 2022 Formation and fluorescent mechanism of red emissive carbon dots from o-phenylenediamine and catechol system The fluorophore source of red emissive oPD&CAT system CDs is the 5,14-dihydroquinoxalino[2,3-b] phenazine (DHQP), formed in the initial reaction stage. Subsequently, the DHQP was connected with carbon core. The excited electrons of the molecular state can transfer into the energy level of CDs, which leads to UV excitation red emissive intensity decreased. Pengfei LiShanshan XueZaicheng Sun Article Open Access 13 Oct 2022