Cover Picture Free Access Transient Structural Colors with Magnesium-Based Reflective Filters (Advanced Optical Materials 13/2022) Inside Front Cover Free Access Optical Gain at 637 nm Wavelength in Polymer Waveguide Amplifier Under Commercial LED Pumping for Planar Photonic Integration (Advanced Optical Materials 13/2022) Back Cover Free Access Surface Structure Dependent Circular Dichroism in Single and Double Gyroid Metamaterials (Advanced Optical Materials 13/2022) Masthead Free Access Masthead: (Advanced Optical Materials 13/2022) Research Articles Open Access Effect of Doping, Photodoping, and Bandgap Variation on the Performance of Perovskite Solar Cells Full Access Chiral Mesostructured Carbonate with Vibrational Circular Dichroism Open Access The Transformation from Translucent into Transparent Rare Earth Ions Doped Oxyfluoride Glass-Ceramics with Enhanced Luminescence Open Access Altering the Reflection Phase for Nano-Polaritons: A Case Study of Hyperbolic Surface Polaritons in Hexagonal Boron Nitride Open Access Development of Unconventional Nano-Metamaterials from Viral Nano-Building Blocks Full Access Enhanced Photocarrier Collection in Bismuth Vanadate Photoanode through Modulating the Inner Potential Distribution Full Access Distinct UV–Visible Responsivity Enhancement of GaAs Photodetectors via Monolithic Integration of Antireflective Nanopillar Structure and UV Absorbing IGZO Layer Full Access Bandgap Engineering of Ternary ε-InSe1−xSx and ε-InSe1−yTey Single Crystals for High-Performance Electronics and Optoelectronics Full Access In Situ Three-Dimensional Observation of Perovskite Crystallization Revealed by Two-Photon Fluorescence Imaging Full Access Learning the Physics of All-Dielectric Metamaterials with Deep Lorentz Neural Networks Full Access Transient Structural Colors with Magnesium-Based Reflective Filters Full Access Printed Chalcogenide/Metal Heterostructured Photodetectors for Flexible Near-Infrared Sensing Full Access Deep Neural Network with Data Cropping Algorithm for Absorptive Frequency-Selective Transmission Metasurface Open Access Light-Actuated Anisotropic Microactuators from CNT/Hydrogel Nanocomposites Full Access Magnetic Doping Induced Strong Circularly Polarized Light Emission and Detection in 2D Layered Halide Perovskite Full Access Flexible Confinement and Manipulation of Mie Resonances via Nano Rectangular Hollow Metasurfaces Full Access Facile Polydimethylsiloxane Treatment of Indium Gallium Zinc Oxide Phototransistor for Visible Light-Based Multilevel Photomemory Full Access Novel Spin-Decoupling Strategy in Liquid Crystal-Integrated Metasurfaces for Interactive Metadisplays Full Access Optical Gain at 637 nm Wavelength in Polymer Waveguide Amplifier Under Commercial LED Pumping for Planar Photonic Integration Open Access Electrically Conductive Photoluminescent Porphyrin Phosphonate Metal–Organic Frameworks Full Access The Optical Absorption Force Allows Controlling Colloidal Assembly Morphology at an Interface Full Access A New Class of Solution Processable Pyrazino[2,3-g]quinoxaline Carbazole Derivative Based on D–A–D Architecture for Achieving High EQE in Yellow and White OLEDs Full Access Highly Efficient Quasi-2D Green Perovskite Light-Emitting Diodes with Bifunctional Amino Acid Full Access Highly Luminescent Copper(I) Halide Phosphors Encapsulated in Fumed Silica for Anti-Counterfeiting and Color-Converting Applications Full Access Blue Thermally Activated Delayed Fluorescence with Sub-Microsecond Short Exciton Lifetimes: Acceleration of Triplet–Singlet Spin Interconversion via Quadrupolar Charge-Transfer States Full Access High-Performance Blue Quantum-Dot Light-Emitting Diodes by Alleviating Electron Trapping Full Access Stereo Meta-Atom Enabled Phase–Amplitude Gradient Metasurface for Circularly Polarized Waves Full Access Low Efficiency Roll-Off Blue Phosphorescent OLEDs at High Brightness Based on [3+2+1] Coordinated Iridium (III) Complexes Open Access Surface Structure Dependent Circular Dichroism in Single and Double Gyroid Metamaterials Full Access Formation of van der Waals Stacked p–n Homojunction Optoelectronic Device of Multilayered ReSe2 by Cr Doping Open Access Stokes Shift Engineered Mn:CdZnS/ZnS Nanocrystals as Reabsorption-Free Nanoscintillators in High Loading Polymer Composites Full Access Green CdSe/CdSeS Core/Alloyed-Crown Nanoplatelets Achieve Unity Photoluminescence Quantum Yield over a Broad Emission Range Open Access Scalable Reflective Plasmonic Structural Colors from Nanoparticles and Cavity Resonances – the Cyan-Magenta-Yellow Approach Full Access Orthorhombic Non-Perovskite CsPbI3 Microwires for Stable High-Resolution X-Ray Detectors Full Access Integrating Photorewritable Fluorescent Information in Shape-Memory Organohydrogel Toward Dual Encryption