All Year All Ionizing terahertz waves with 260 MV/cm from scalable optical rectification Intense terahertz pulses, produced from a large-area lithium niobate wafer via phase-matched optical rectification of 150-terawatt laser pulses, ionize atoms and molecules and turn them into plasma. Hyeongmun KimChul KangKi-Yong Kim Article Open Access 27 May 2024 Strong nonlinear optical processes with extraordinary polarization anisotropy in inversion-symmetry broken two-dimensional PdPSe Song ZhuRuihuan DuanQi Jie Wang Article Open Access 27 May 2024 Visualization of cristae and mtDNA interactions via STED nanoscopy using a low saturation power probe HBmito Crimson has the ability to localize specifically on the inner mitochondrial membrane and emit light, while its superior photostability enables STED imaging. Wei RenXichuan GePeng Xi Article Open Access 24 May 2024 Etching-free pixel definition in InGaN green micro-LEDs The selective thermal oxidation method was used to define high-performance micro-LED pixels without suffering plasma etching and sidewall damage. Zhiyuan LiuYi LuXiaohang Li Article Open Access 24 May 2024 Light People: Professor Fanglin Bao and his cover story Ji Wang Light People Open Access 22 May 2024 Omnidirectional color wavelength tuning of stretchable chiral liquid crystal elastomers On-demand color control, enabling simultaneous and omni-directional wavelength tuning towards both shorter (blue-shift) and longer (red-shift) wavelengths, is reported using stretchable chiral liquid crystal elastomers. Seungmin NamWontae JungSu Seok Choi Article Open Access 22 May 2024 Wireless sequential dual light delivery for programmed PDT in vivo A light-sensitive polymer nanocarrier encapsulating photosensitizer was synthesized. An implantable wireless device delivers two light wavelengths sequentially was developed to programmatically control the release and activation of the loaded photosensitizer. Jiayi LiuBowen SunYong Zhang Article Open Access 15 May 2024 Magnetically controllable multimode interference in topological photonic crystals The power splitting of our waveguide system induced by multimode interference, is controlled by two chiral edge modes’ propagating phase difference, which depends on magnetic field intensity and wave frequency. Weiyuan TangMudi WangShuang Zhang Article Open Access 14 May 2024 Enhancing crystal integrity and structural rigidity of CsPbBr3 nanoplatelets to achieve a narrow color-saturated blue emission The chemical equilibrium is optimized using N-dodecylbenzene sulfonic acid for enhancing the crystal integrity and structural rigidity of CsPbBr3 perovskite nanoplatelets, resulting in their spectrally stable, bright and extremely narrow color-saturated blue emission. Qianqian HuangWenxu YinAndrey L. Rogach Article Open Access 11 May 2024 Entangled photon pair generation in an integrated SiC platform Illustration of entangled photon pair generation in an integrated silicon carbide (SiC) platform. This achievement, coupled with SiC’s potential to integrate various electrical, photonic and quantum technologies in the same device platform, offers promises for the scalable implementation of quantum information processing. Anouar RahmouniRuixuan WangLijun Ma Article Open Access 09 May 2024 Strong-field photoelectron holography in the subcycle limit Fundamental electron-holograms in the single-cycle limit are clearly unveiled to identify electron Gouy-phase and extract the internuclear separation. Tsendsuren KhurelbaatarJaewuk HeoDong Eon Kim Article Open Access 08 May 2024 Optical probing of ultrafast laser-induced solid-to-overdense-plasma transitions A novel, single-shot probing technique visualizes the ultrafast laser-induced solid-to-plasma transition. The entire target dynamics (ionization to overdense plasma) is elucidated by combining solid-state interaction model and kinetic plasma description. Yasmina AzamoumGeorg Alexander BeckerMalte Christoph Kaluza Article Open Access 08 May 2024 A head-mounted photoacoustic fiberscope for hemodynamic imaging in mobile mice A head-mounted photoacoustic fiberscope enables hemodynamic imaging in mobile mice. Xiaoyan ZhengShuai Na News & Views Open Access 07 May 2024 Small and simple: next-generation miniaturized diffraction-based spectrometer with computational reconstruction algorithms Markus Suta News & Views Open Access 07 May 2024