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| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2603.25090 |
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| _version_ | 1866917362474680320 |
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| author | Aschwanden, Rebecca Claro-Rodríguez, Nicolás Zhao, Ruizhe Kallert, Patricia Krieger, Tobias Buchinger, Quirin da Silva, Saimon F. Covre Stroj, Sandra Rota, Michele Höfling, Sven Huber-Loyola, Tobias Rastelli, Armando Trotta, Rinaldo Huang, Lingling Bartley, Tim Jöns, Klaus D. Zentgraf, Thomas |
| author_facet | Aschwanden, Rebecca Claro-Rodríguez, Nicolás Zhao, Ruizhe Kallert, Patricia Krieger, Tobias Buchinger, Quirin da Silva, Saimon F. Covre Stroj, Sandra Rota, Michele Höfling, Sven Huber-Loyola, Tobias Rastelli, Armando Trotta, Rinaldo Huang, Lingling Bartley, Tim Jöns, Klaus D. Zentgraf, Thomas |
| contents | Beamsplitters represent fundamental components in both classical and quantum optical systems, enabling the distribution of light, as well as the generation of interference, superposition and entanglement. However, optical networks constructed from conventional bulk 2x2-beamsplitters encounter inherent scalability issues, as the number of required beamsplitters scales quadratically with the number of optical modes for a fully connected network. Metasurfaces offer a promising route to overcome these constraints. By manipulating light at the wavelength scale compact optical components with advanced functionalities can be constructed, which address several modes simultaneously. In this work, we design and experimentally utilize a metasurface as a multiport beamsplitter. Furthermore, we realize a multimode interferometer composed of two cascaded metasurfaces. We characterize the individual and cascaded metasurfaces using classical light, showing controllable splitting ratios through tunable phase relations. We then expand the approach to quantum light, employing single photons to demonstrate second- and third-order photon correlations, as well as single photon interference across multiple spatial paths. These results establish metasurface-based multiport beamsplitters as a scalable and reconfigurable platform bridging classical and quantum photonics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_25090 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Cascaded Metasurface Interferometer for Multipath Interference with Classical and Quantum Light Aschwanden, Rebecca Claro-Rodríguez, Nicolás Zhao, Ruizhe Kallert, Patricia Krieger, Tobias Buchinger, Quirin da Silva, Saimon F. Covre Stroj, Sandra Rota, Michele Höfling, Sven Huber-Loyola, Tobias Rastelli, Armando Trotta, Rinaldo Huang, Lingling Bartley, Tim Jöns, Klaus D. Zentgraf, Thomas Optics Quantum Physics Beamsplitters represent fundamental components in both classical and quantum optical systems, enabling the distribution of light, as well as the generation of interference, superposition and entanglement. However, optical networks constructed from conventional bulk 2x2-beamsplitters encounter inherent scalability issues, as the number of required beamsplitters scales quadratically with the number of optical modes for a fully connected network. Metasurfaces offer a promising route to overcome these constraints. By manipulating light at the wavelength scale compact optical components with advanced functionalities can be constructed, which address several modes simultaneously. In this work, we design and experimentally utilize a metasurface as a multiport beamsplitter. Furthermore, we realize a multimode interferometer composed of two cascaded metasurfaces. We characterize the individual and cascaded metasurfaces using classical light, showing controllable splitting ratios through tunable phase relations. We then expand the approach to quantum light, employing single photons to demonstrate second- and third-order photon correlations, as well as single photon interference across multiple spatial paths. These results establish metasurface-based multiport beamsplitters as a scalable and reconfigurable platform bridging classical and quantum photonics. |
| title | Cascaded Metasurface Interferometer for Multipath Interference with Classical and Quantum Light |
| topic | Optics Quantum Physics |
| url | https://arxiv.org/abs/2603.25090 |