Uloženo v:
| Hlavní autoři: | , , , , , , , , , , , , |
|---|---|
| Médium: | Preprint |
| Vydáno: |
2025
|
| Témata: | |
| On-line přístup: | https://arxiv.org/abs/2502.07430 |
| Tagy: |
Přidat tag
Žádné tagy, Buďte první, kdo vytvoří štítek k tomuto záznamu!
|
| _version_ | 1866912228966400000 |
|---|---|
| author | Oliwa, Przemysław Kapuściński, Piotr Popławska, Maria Muszyński, Marcin Król, Mateusz Morawiak, Przemysław Mazur, Rafał Piecek, Wiktor Kula, Przemysław Bardyszewski, Witold Piętka, Barbara Sigurðsson, Helgi Szczytko, Jacek |
| author_facet | Oliwa, Przemysław Kapuściński, Piotr Popławska, Maria Muszyński, Marcin Król, Mateusz Morawiak, Przemysław Mazur, Rafał Piecek, Wiktor Kula, Przemysław Bardyszewski, Witold Piętka, Barbara Sigurðsson, Helgi Szczytko, Jacek |
| contents | Momentum space polarization singularities of light appear as vectorial twists in the scattered and radiated far field patterns of exotic photonic structures. They relate to important concepts such as bound states in the continuum, spatiotemporal light steering, polarization Möbius strips, Berry curvature and associated topological photonic phenomena. Polarization singularities, such as completely circularly polarized C-points, are readily designed in real space through interference of differently polarized beams. In momentum space, they require instead sophisticated patterning of photonic crystal slabs of reduced symmetries in order to appear in the corresponding band structure with scarce in-situ tunability. Here, we show that momentum space singularities can be generated and, importantly, electrically tuned in the band structure of a highly birefringent planar liquid crystal microcavity that retains many symmetries. Our results agree with theoretical predictions and offer exciting possibilities for integration of momentum space polarization singularities in spinoptronic technologies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_07430 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Electrically tunable momentum space polarization singularities in liquid crystal microcavities Oliwa, Przemysław Kapuściński, Piotr Popławska, Maria Muszyński, Marcin Król, Mateusz Morawiak, Przemysław Mazur, Rafał Piecek, Wiktor Kula, Przemysław Bardyszewski, Witold Piętka, Barbara Sigurðsson, Helgi Szczytko, Jacek Optics Momentum space polarization singularities of light appear as vectorial twists in the scattered and radiated far field patterns of exotic photonic structures. They relate to important concepts such as bound states in the continuum, spatiotemporal light steering, polarization Möbius strips, Berry curvature and associated topological photonic phenomena. Polarization singularities, such as completely circularly polarized C-points, are readily designed in real space through interference of differently polarized beams. In momentum space, they require instead sophisticated patterning of photonic crystal slabs of reduced symmetries in order to appear in the corresponding band structure with scarce in-situ tunability. Here, we show that momentum space singularities can be generated and, importantly, electrically tuned in the band structure of a highly birefringent planar liquid crystal microcavity that retains many symmetries. Our results agree with theoretical predictions and offer exciting possibilities for integration of momentum space polarization singularities in spinoptronic technologies. |
| title | Electrically tunable momentum space polarization singularities in liquid crystal microcavities |
| topic | Optics |
| url | https://arxiv.org/abs/2502.07430 |