Fast thermo-optic switching on silicon nitride platform through parity-time symmetry breaking
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arXiv
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866912003662020608 |
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| author | Pradip, Ravi Varri, Venkata Sai Akhil McRae, Liam Brückerhoff-Plückelmann, Frank Wendland, Daniel Ovvyan, Anna P. Taheriniya, Shabnam Pernice, Wolfram Ferrari, Simone |
| author_facet | Pradip, Ravi Varri, Venkata Sai Akhil McRae, Liam Brückerhoff-Plückelmann, Frank Wendland, Daniel Ovvyan, Anna P. Taheriniya, Shabnam Pernice, Wolfram Ferrari, Simone |
| contents | This work demonstrates a fast thermo-optic switching mechanism on silicon nitride on insulator platform leveraging parity-time symmetry breaking. The cladding-free design enables low-loss optical propagation in a partially metal-covered waveguide, with the same metal layer serving as an integrated heater for rapid phase tuning. The fabricated device exhibits an 8.5 μs rise time for a π phase shift, despite the weak thermo-optic coefficient in silicon nitride. Additionally, the impact of thermal cross-talk is investigated and an insertion loss as low as 0.39 dB for a 100-μm-long heater-waveguide section is demonstrated. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_15139 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Fast thermo-optic switching on silicon nitride platform through parity-time symmetry breaking Pradip, Ravi Varri, Venkata Sai Akhil McRae, Liam Brückerhoff-Plückelmann, Frank Wendland, Daniel Ovvyan, Anna P. Taheriniya, Shabnam Pernice, Wolfram Ferrari, Simone Optics Applied Physics This work demonstrates a fast thermo-optic switching mechanism on silicon nitride on insulator platform leveraging parity-time symmetry breaking. The cladding-free design enables low-loss optical propagation in a partially metal-covered waveguide, with the same metal layer serving as an integrated heater for rapid phase tuning. The fabricated device exhibits an 8.5 μs rise time for a π phase shift, despite the weak thermo-optic coefficient in silicon nitride. Additionally, the impact of thermal cross-talk is investigated and an insertion loss as low as 0.39 dB for a 100-μm-long heater-waveguide section is demonstrated. |
| title | Fast thermo-optic switching on silicon nitride platform through parity-time symmetry breaking |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2408.15139 |