Print Email Facebook Twitter Reconstructing the scattering matrix of photonic systems from quasinormal modes Title Reconstructing the scattering matrix of photonic systems from quasinormal modes Author Alpeggiani, F. (TU Delft QN/Kuipers Lab; Kavli institute of nanoscience Delft) Parappurath, N. (Center for Nanophotonics) Verhagen, Ewold (Center for Nanophotonics) Kuipers, L. (TU Delft QN/Quantum Nanoscience; Kavli institute of nanoscience Delft) Department QN/Quantum Nanoscience Date 2017-09-01 Abstract The scattering matrix is a fundamental tool to quantitatively describe the properties of resonant systems. In particular, it enables the understanding of many photonic devices of current interest, such as photonic metasurfaces and nanostructured optical scatterers. In this contribution, we show that the scattering matrix of a photonic system is completely determined by its quasinormal modes, i.e., the self-sustaining electromagnetic excitations at a complex frequency. On the basis of temporal coupled-mode theory, we derive an expression for the expansion of the scattering matrix on quasinormal modes, which is directly applicable to an arbitrary number of modes and input/output channels. Our theory does not require any ad-hoc assumptions, such as the fitting of an additional nonresonant background. We validate and discuss the theoretical formalism with some illustrative examples. This demonstrates that the theory represents a powerful and predictive tool for calculating the highly structured spectra of resonant nanophotonic systems, and, at the same time, a key for unravelling the physical mechanisms at the heart of such intricate spectral structures. Subject photonic crystalsquasinormal modesresonant statesscattering matrixtheoretical photonics To reference this document use: http://resolver.tudelft.nl/uuid:79de129d-415e-4662-bdc5-3d02ce4a8b5f DOI https://doi.org/10.1109/ICTON.2017.8025077 Publisher IEEE ISBN 9781538608586 Source ICTON 2017 - 19th International Conference on Transparent Optical Networks Event 19th International Conference on Transparent Optical Networks, ICTON 2017, 2017-07-02 → 2017-07-06, Girona, Catalonia, Spain Part of collection Institutional Repository Document type conference paper Rights © 2017 F. Alpeggiani, N. Parappurath, Ewold Verhagen, L. Kuipers Files PDF Alpeggiani_proceedings_ic ... n_2017.pdf 542.64 KB Close viewer /islandora/object/uuid:79de129d-415e-4662-bdc5-3d02ce4a8b5f/datastream/OBJ/view