Karl Franzens University Graz
Graz University of Technology
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Karl Franzens University Graz | Graz University of Technology | |
Spectrally selective metasurfaces for spatially encoded light-matter coupling Photonic bound states in the continuum (BICs) have enabled a new class of spectrally selective metasurfaces supporting ultrasharp resonances, enabling breakthroughs in higher-harmonic generation, strong light-matter coupling, biodetection, and lasing. However, many implementations still face constraints related to large metasurface footprints, fabrication limits requiring constant resonator heights throughout the structure, or limited numbers of resonances. In this talk, I will present some of our recent concepts for obtaining additional nanophotonic functionalities in BIC-driven systems, including the arrangement of resonators in radial configurations for polarization invariance and reduced footprints as well as height-driven BICs for obtaining maximally chiral light-matter interactions. Finally, I will show how BIC metasurfaces with continuously varying structural parameters can be leveraged to spatially encode spectral and molecular coupling information simultaneously, enabling new perspectives for biochemical spectroscopy. |