Photo: Andrei Odintcov
In her doctoral dissertation, Evellyn Santos Magalhães investigates the development of glass-based photonic materials capable of persistent luminescence after near-infrared (NIR) excitation. By embedding persistent luminescent phosphors into phosphate, silicate and tellurite glass matrices, her work demonstrates that functional materials can be fabricated in bulk, 3D-printed scaffold and optical fibre architectures while maintaining green afterglow after NIR charging. This behaviour is achieved by coupling Yb³⁺/Tm³⁺ upconversion ions with SrAl₂O₄:Eu²⁺,Dy³⁺ phosphors, where NIR photons are converted into visible light that triggers energy storage and delayed emission. These materials open new opportunities for compact photonic devices, including optical sensing platforms, anti-counterfeiting technologies and light-activated biomedical systems.
The doctoral dissertation of Evellyn Santos Magalhães in the field of Photonics titled Advanced Engineering of NIR-Rechargeable Persistent Luminescent Glass Composites: From Bulk to Scaffold and Fiber Architectures will be publicly examined at the Faculty of Engineering and Natural Sciences at Tampere University via Zoom on Friday 27 March 2026.
The Opponents will be Professor Angela Seddon from the University of Nottingham, United Kingdom, and Professor Gaëlle Delaizir from the University of Limoges, France. The Custos will be Professor Laeticia Petit from the Faculty of Engineering and Natural Sciences at Tampere University.