Photonic and plasmonic resonators are dielectric or metallic optical devices that confine light at a scale smaller than the wavelength. The eigenmodes of the system are obviously powerful and intuitive tools to describe light scattering and light-matter interactions mediated by the resonant structure. However, owing to the presence of energy dissipation (by radiation or absorption), using the eigenmodes of nanoresonators is an open issue that has been partly solved only recently. We have developed a modal formalism that relies on the concept of quasinormal modes with complex eigenfrequencies. The theory is capable of handling any photonic or plasmonic resonator with strong radiation leakage, absorption and material dispersion. The normalization of the quasinormal modes constitutes one of the key points of the modal formalism; only a proper and efficient normalization method can ensure both a good accuracy and a high versatility of the theory. Different methods for normalizing quasinormal modes have been published recently. We benchmark these methods on the generic example of a plasmonic nanoantenna lying over a substrate.
C. Sauvan, J.-P. Hugonin, and P. Lalanne, "Photonic and plasmonic nanoresonators: a modal approach," Proc. SPIE 9546, Active Photonic Materials VII, 95461C (Presented at SPIE Nanoscience + Engineering: August 12, 2015; Published: 31 August 2015); https://doi.org/10.1117/12.2190201.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the proceedings. They include the speaker's narration with video of the slides and animations. Most include full-text papers. Interactive, searchable transcripts and closed captioning are now available for most presentations.
Search our growing collection of more than 29,500 conference presentations, including many plenaries and keynotes.