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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2508.20490 |
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| _version_ | 1866914010910162944 |
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| author | Bao, Fangfa Ruan, Jiakai Li, Weijia Zhang, Wei Wang, Guoxiang Shen, Xiang Gao, Yixiao |
| author_facet | Bao, Fangfa Ruan, Jiakai Li, Weijia Zhang, Wei Wang, Guoxiang Shen, Xiang Gao, Yixiao |
| contents | Compact, non-volatile optical switches on silicon platforms are essential for reconfigurable photonics, but the strong anisotropy of silicon waveguides leads to polarization-dependent performance. In this paper, we propose a polarization-independent, non-volatile optical switch utilizing low-loss phase change material (PCM) Sb2S3. By incorporating Sb2S3 into a multimode slot waveguide, multimode interference can be efficiently tuned for both TE and TM polarizations, owing to enhanced light-PCM interaction. Polarization-independent switching is achieved through the optimal design of the multimode slot waveguide region. The proposed non-volatile switch demonstrates a crosstalk (CT) < -21.9 dB and insertion loss (IL) < 0.12 dB at 1550 nm with a multimode section length of 9.67 μm, which may find promising applications in reconfigurable photonic circuits for on-chip optical signal processing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_20490 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Compact polarization-independent non-volatile optical switches Bao, Fangfa Ruan, Jiakai Li, Weijia Zhang, Wei Wang, Guoxiang Shen, Xiang Gao, Yixiao Optics Compact, non-volatile optical switches on silicon platforms are essential for reconfigurable photonics, but the strong anisotropy of silicon waveguides leads to polarization-dependent performance. In this paper, we propose a polarization-independent, non-volatile optical switch utilizing low-loss phase change material (PCM) Sb2S3. By incorporating Sb2S3 into a multimode slot waveguide, multimode interference can be efficiently tuned for both TE and TM polarizations, owing to enhanced light-PCM interaction. Polarization-independent switching is achieved through the optimal design of the multimode slot waveguide region. The proposed non-volatile switch demonstrates a crosstalk (CT) < -21.9 dB and insertion loss (IL) < 0.12 dB at 1550 nm with a multimode section length of 9.67 μm, which may find promising applications in reconfigurable photonic circuits for on-chip optical signal processing. |
| title | Compact polarization-independent non-volatile optical switches |
| topic | Optics |
| url | https://arxiv.org/abs/2508.20490 |