Topological Directional Coupler
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arXiv
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| Hauptverfasser: | , , , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2023
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| _version_ | 1866910475910905856 |
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| author | Li, Yandong Jung, Minwoo Yu, Yang Han, Yuchen Zhang, Baile Shvets, Gennady |
| author_facet | Li, Yandong Jung, Minwoo Yu, Yang Han, Yuchen Zhang, Baile Shvets, Gennady |
| contents | Interferometers and beam splitters are fundamental building blocks for photonic neuromorphic and quantum computing machinery. In waveguide-based photonic integrated circuits, beam-splitting is achieved with directional couplers that rely on transition regions where the waveguides are adiabatically bent to suppress back-reflection. We present a novel, compact approach to introducing guided mode coupling. By leveraging multimodal domain walls between microwave topological photonic crystals, we use the photonic-spin-conservation to suppress back-reflection while relaxing the topological protection of the valley degree of freedom to implement tunable beam splitting. Rapid advancements in chip-scale topological photonics suggest that the proposed simultaneous utilization of multiple topological degrees of freedom could benefit the development of novel photonic computing platforms. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_18272 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Topological Directional Coupler Li, Yandong Jung, Minwoo Yu, Yang Han, Yuchen Zhang, Baile Shvets, Gennady Mesoscale and Nanoscale Physics Optics Interferometers and beam splitters are fundamental building blocks for photonic neuromorphic and quantum computing machinery. In waveguide-based photonic integrated circuits, beam-splitting is achieved with directional couplers that rely on transition regions where the waveguides are adiabatically bent to suppress back-reflection. We present a novel, compact approach to introducing guided mode coupling. By leveraging multimodal domain walls between microwave topological photonic crystals, we use the photonic-spin-conservation to suppress back-reflection while relaxing the topological protection of the valley degree of freedom to implement tunable beam splitting. Rapid advancements in chip-scale topological photonics suggest that the proposed simultaneous utilization of multiple topological degrees of freedom could benefit the development of novel photonic computing platforms. |
| title | Topological Directional Coupler |
| topic | Mesoscale and Nanoscale Physics Optics |
| url | https://arxiv.org/abs/2311.18272 |