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Fast thermo-optic switching on silicon nitride platform through parity-time symmetry breaking

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arxiv 2408.15139 v1 pith:NZNUS4P3 submitted 2024-08-27 physics.optics physics.app-ph

classification physics.opticsphysics.app-ph
keywords nitridesiliconthermo-opticbreakingfastparity-timephaseplatform
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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 {\mu}s rise time for a {\pi} 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-{\mu}m-long heater-waveguide section is demonstrated.

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  1. Scalable Trapped Ion Addressing with Adjoint-optimized Multimode Photonic Circuits

    physics.optics 2025-05 conditional novelty 5.0 of 10

    An integrated multimode photonic circuit is simulated to address individual and pairs of trapped ions with crosstalk between -20 and -60 dB at 5 to 8 micrometer spacing.

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