Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 15: Crystal Structure Defects / Real Structure / Microstructure
KFM 15.5: Vortrag
Donnerstag, 20. März 2025, 10:45–11:00, H9
Inverted Designs of Dielectric Metasurfaces Based on TiO2.: A Study on Quasi-Bound States in Continuum (qBIC) — •Justin Schulz1, Jack Dobie1,2, Oisin McCormack1,2, Yongliang Zhang1, Hodjat Hajian1, Owen Moynihan2, Brian Corbett2, and A. Louise Bradley1,2 — 1School of Physics, Trinity College Dublin, Dublin 2, Ireland — 2IPIC, Tyndall, University College Cork, Cork, Ireland
Dielectric metasurfaces, engineered to manipulate light primarily by controlling the phase and amplitude of the scattered light, have garnered significant interest in recent years, particularly due to their ability to support quasi-Bound States in Continuum (qBIC).
Building upon previous work on slotted disk metasurfaces fabricated in Si3N4, we investigate inverted TiO2-based designs. TiO2, with its high refractive index, offers distinct advantages in enhancing the resonance properties of dielectric metasurfaces, enabling more efficient light-matter interactions.
A key objective of this work is to perform a comparative analysis between slotted disk structures and their inverted counterparts, with a focus on their respective lattice and qBIC modes. Future prospects of TiO2-based dielectric metasurfaces and the potential applications in low-energy switching and polariton lasing are discussed, with a particular focus on their integration with transition-metal dichalcogenide (TMDC) monolayers or quantum dots. This project is funded through; Taighde Éireann/Research Ireland Frontiers for the Future Award - SFI-21/FFP-P/10187, 12/RC/2278_2, and 12/RC/2276_P2.
Keywords: Dielectric Metasurfaces; Quasi-Bound States in Continuum; Titanium dioxide; Enhanced light-matter interaction