Laser 3D Micro‐/Nano‐Structurization of Luminescent Materials

Abstract 3D printing of microstructures has gained significant attention due to its diverse applications, including photonic crystals and waveguides. One area of interest is the 3D structuring of luminescent materials, essential for applications such as bioimaging, microlasers, and micro‐LEDs (light‐emitting diodes). Traditional manufacturing methods for such materials, such as monocrystal growth, are costly and time consuming, often requiring extensive post‐processing. Laser direct writing challenges this traditional notion by significantly reducing production time and cost. This method also allows for two‐photon polymerization, enhancing the quality of 3D‐printed structures and modifying the emission spectrum of phosphors for broader applications. In some cases, laser writing can even serve as a synthesis method for new compounds. This review explores various 3D printing methods, materials (organic, hybrid, and inorganic), and the fabrication of luminescentmicrostructures. It highlights how laser direct writing and 3D lithography provide new opportunities for modifying existing luminescent materials and developing new ones. The goal is to showcase successful 3D printing methods and their expected outcomes, emphasizing the potential for innovative applications in luminescent materials.