Confocal polarization tomography of dielectric nanocavities
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866915069030301696 |
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| author | Schröder, Frederik van Exter, Martin P. Xiong, Meng Kountouris, George Wubs, Martijn Kristensen, Philip T. Stenger, Nicolas |
| author_facet | Schröder, Frederik van Exter, Martin P. Xiong, Meng Kountouris, George Wubs, Martijn Kristensen, Philip T. Stenger, Nicolas |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_12943 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Confocal polarization tomography of dielectric nanocavities Schröder, Frederik van Exter, Martin P. Xiong, Meng Kountouris, George Wubs, Martijn Kristensen, Philip T. Stenger, Nicolas Optics 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. |
| title | Confocal polarization tomography of dielectric nanocavities |
| topic | Optics |
| url | https://arxiv.org/abs/2412.12943 |