Open Access 14 Mar 2022 A flexible, multifunctional, optoelectronic anticounterfeiting device from high-performance organic light-emitting paper Flexible optoelectronic anticounterfeiting device based on OLED paper can show different luminous states visible to the naked eye under light, electricity, and combined light and electricity stimulus. Teng PanShihao LiuCunjiang Yu All-optical modulation of quantum states by nonlinear metasurface Di ZhangYang ChenJingjun Xu Article Open Access 11 Mar 2022 Non-destructive OAM measurement via light–matter interaction A recent publication suggests a new solution for the in situ non-destructive OAM measurement of highly-intense vortex pulses by analyzing the photoelectrons momentum distribution generated in a strong-field ionization process. Gianluca Ruffato News & Views Open Access 10 Mar 2022 Holo-imprinting polarization optics with a reflective liquid crystal hologram template Holo-imprinting of photo-aligning planar liquid crystal optics enables a fast and efficient fabrication process for advanced imaging and display devices, including augmented reality and virtual reality. Jianghao XiongQian YangShin-Tson Wu Article Open Access 10 Mar 2022 Hybrid Dirac semimetal-based photodetector with efficient low-energy photon harvesting A versatile manipulation of the optoelectronic properties within the Dirac-semimetals and its van der Waals heterostructures beyond skin-depth limit, opening up substantial potential for engineering spontaneous photocurrent with high SNR ratio and imaging at far-IR/THz band at room temperature. Lin WangLi HanWei Lu Article Open Access 10 Mar 2022 Confined-domain crosslink-enhanced emission effect in carbonized polymer dots Confined-domain crosslink-enhanced emission effect was first studied to reveal the photoluminescence mechanism of carbonized polymer dots (CPDs). A general strategy was exploited to synthesize CPDs exhibiting tunable photoluminescence properties. Songyuan TaoChangjiang ZhouBai Yang Article Open Access 10 Mar 2022 Mechanism of the trivalent lanthanides’ persistent luminescence in wide bandgap materials Long persistent luminescence of Gd3+ is reported and a possible mechanism of the trivalent lanthanides’ persistent luminescence in wide bandgap hosts is proposed. Leipeng LiTianyi LiJianrong Qiu Article Open Access 08 Mar 2022 Compact ultrabroadband light-emitting diodes based on lanthanide-doped lead-free double perovskites Ln:Cs2Ag(In/Bi)Cl6@glass composite yielding a Vis–NIR continuous spectrum is used to construct an ultrabroadband lighting source. Shilin JinRenfu LiDaqin Chen