Dual-Frequency Wireless Power Transfer with Metasurfaces for Targeted Retinal Stimulation

This work presents a novel wireless power transfer (WPT) system for retinal therapies, which employs metasurfaces capable to significantly improve power transfer efficiency (PTE) and to allow a locally targeted stimulation. The system is designed to be used in therapeutic applications for retinal degenerative diseases, by delivering non-invasive, patient-specific electromagnetic stimulation with a dual-frequency WPT configuration. Previous studies have shown that integrating metasurfaces within WPT systems improves power transfer efficiency by optimizing the spatial distribution of the magnetic field and mitigating the effects of misalignment between transmitting and receiving coils (Lazzoni, V., Brizi, D. & Monorchio, A. “Spatial filtering magnetic metasurface for misalignment robustness enhancement in wireless power transfer applications”. Sci Rep13, 560. 2023.). By relying upon this study, our work applies the metasurface concept to retinal therapy, providing a customized system to meet the specific needs of therapeutic electrical stimulation.