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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2410.15351 |
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| _version_ | 1866915977342484480 |
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| author | Staliunas, Kestutis |
| author_facet | Staliunas, Kestutis |
| contents | There is no simple and universal analytical description of various micro-optical systems related with Fano resonances. This especially concern modulated thin films, which, when coupled to external fields, show Fano resonances. Usually, such micro-optic circuits are simulated numerically, frequently by the use of commercial software. We fill this gap of the lack of universal analytical description by introducing and exploring a simple mechanical equivalent, the oscillator chain, which mimic such schemes involving Fano resonances. The model does not necessary provide the rigorous description of complicated micro-optical schemes, however does capture the main properties of such Fano-related micro-optical systems. The model captures different modifications of the thin film arrangement as well: thin film with amplification, non-Hermitical thin films, and others. It also covers the case of multiple Fano resonances in a thin film. The model is compared with the rigorously calculated (Rigorous Coupled Wave analysis) wave propagation in the thin films. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_15351 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Oscillator Chain: A Simple Model for Universal Description of Excitation of Waveguiding Modes in Thin Films Staliunas, Kestutis Optics There is no simple and universal analytical description of various micro-optical systems related with Fano resonances. This especially concern modulated thin films, which, when coupled to external fields, show Fano resonances. Usually, such micro-optic circuits are simulated numerically, frequently by the use of commercial software. We fill this gap of the lack of universal analytical description by introducing and exploring a simple mechanical equivalent, the oscillator chain, which mimic such schemes involving Fano resonances. The model does not necessary provide the rigorous description of complicated micro-optical schemes, however does capture the main properties of such Fano-related micro-optical systems. The model captures different modifications of the thin film arrangement as well: thin film with amplification, non-Hermitical thin films, and others. It also covers the case of multiple Fano resonances in a thin film. The model is compared with the rigorously calculated (Rigorous Coupled Wave analysis) wave propagation in the thin films. |
| title | Oscillator Chain: A Simple Model for Universal Description of Excitation of Waveguiding Modes in Thin Films |
| topic | Optics |
| url | https://arxiv.org/abs/2410.15351 |