Quasi Normal Modes in Dispersive Photonic Time-Crystals
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arXiv
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| Hauptverfasser: | , , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866912646103564288 |
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| author | Hooper, Calvin M. Hooper, Ian R. Horsley, Simon A. R. |
| author_facet | Hooper, Calvin M. Hooper, Ian R. Horsley, Simon A. R. |
| contents | Quasinormal modes characterise the transient response of static optical cavities. Here, we introduce the notion of a Floquet quasinormal mode to describe transient responses in photonic time crystals. Contrasting their static counterparts, exceptional points associated with symmetry transitions are an inherent feature, as modes spontaneously and non-perturbatively lock their phase to the oscillations of the material. We further investigate the limiting behaviour of the Floquet quasinormal modes in large cavities. Distinct non-perturbative behaviour arises in time-modulated systems as increasingly large time-crystal cavities come closer to achieving the maximum gain predicted from a bulk wavenumber bandgap. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_12438 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quasi Normal Modes in Dispersive Photonic Time-Crystals Hooper, Calvin M. Hooper, Ian R. Horsley, Simon A. R. Optics Quasinormal modes characterise the transient response of static optical cavities. Here, we introduce the notion of a Floquet quasinormal mode to describe transient responses in photonic time crystals. Contrasting their static counterparts, exceptional points associated with symmetry transitions are an inherent feature, as modes spontaneously and non-perturbatively lock their phase to the oscillations of the material. We further investigate the limiting behaviour of the Floquet quasinormal modes in large cavities. Distinct non-perturbative behaviour arises in time-modulated systems as increasingly large time-crystal cavities come closer to achieving the maximum gain predicted from a bulk wavenumber bandgap. |
| title | Quasi Normal Modes in Dispersive Photonic Time-Crystals |
| topic | Optics |
| url | https://arxiv.org/abs/2510.12438 |