Ultrafast tuning of radiative optical losses in quasi-bound states in the continuum

Possmayer, ThomasThomasPossmayerAigner, AndreasAndreasAignerWeber, ThomasThomasWeberMenezes, Leonardo de S.Leonardo de S.MenezesMaier, Stefan A.Stefan A.MaierTittl, AndreasAndreasTittl2026-03-132026-03-132025-06Conference on Lasers and Electro Optics Europe and European Quantum Electronics Conference, CLEO 2025https://hdl.handle.net/11420/62048Optically resonant metasurfaces provide a convenient way to enhance light-matter interactions in a confined spectral region, boosting nonlinear phenomena, sensitivity in biosensing, or spontaneous emission. Specifically, structures based on symmetry-protected quasi-bound states in the continuum (qBICs) have emerged as a popular framework to design resonant metasurfaces, as their structure does not only determine the resonance's wavelength, but also the quality-factor through the asymmetry of each unit cell [1].enTechnology::600: TechnologyUltrafast tuning of radiative optical losses in quasi-bound states in the continuumConference Paper10.1109/CLEO/EUROPE-EQEC65582.2025.11110411Conference Paper