Laser Printing of Luminescent YAG:Ce 3D Microstructures

Yttrium aliuminium garnet (YAG) has been a laser gain medium for over 60 years [1]. Czochralski synthesis method has been used as the primary production method of YAG monocrystals [2]. While polycrystalline YAG has a higher number of synthesis methods available for its production [3], [4], none of them are suitable for the fabrication of complex 3D YAG microstructures. This work aims to show that two-photon polymerization laser 3D printing [5] can produce polycrystalline 3D luminescent YAG:Ce microstructures via the post-processing calcination step [6], [7].