Confocal polarization tomography of dielectric nanocavities
We employ polarization tomography to characterize the modal properties of a dielectric nanocavity with sub-wavelength mode confinement. Our analysis of reflection spectra shows that the Fano-lineshape depends strongly on the polarization in a confocal configuration, and that the lineshape can be transformed into a Lorentzian-like peak for a certain polarization. For this polarization setting, the background is almost fully suppressed in a finite range of frequencies. This enables us to identify another resonance that has not yet been experimentally reported for these nanocavities. Lastly, we use symmetry-forbidden polarizations and show that, surprisingly, the modal resonance features of the system remain visible.
Authors
- George Kountouris (ORCID: https://orcid.org/0000-0003-4750-8701)
- Meng Xiong (ORCID: https://orcid.org/0000-0001-9723-3019)
- M. P. van Exter (ORCID: https://orcid.org/0000-0003-0839-3219)
- Martijn Wubs (ORCID: https://orcid.org/0000-0002-8286-7825)
- Philip Trøst Kristensen (ORCID: https://orcid.org/0000-0001-5804-1989)
- Frederik Schröder
- Nicolas Stenger (ORCID: https://orcid.org/0000-0002-6808-9211)
Institutions
- Leiden University (NL)
- Huygens Institute for History and Culture of the Netherlands (NL)
- Ørsted (Denmark) (DK)
- Technical University of Denmark (DK)
Publication Details
- Journal
- Nanophotonics
- Published
- 2025-04-23
- DOI
- https://doi.org/10.1515/nanoph-2024-0744
- Citations
- 2
- Primary Topic
- Photonic and Optical Devices
- Type
- article
- Field-Weighted Citation Impact
- 1.46
Funders
- National Research Foundation
- Danmarks Grundforskningsfond
- Novo Nordisk
- Otto Mønsteds Fond
- Danmarks Tekniske Universitet
- Novo Nordisk Fonden