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arXiv · 2603.10286

Frozen mode in coupled single-mode waveguides with gratings

Albert Herrero-Parareda·Nathaniel Furman·Bradley J. Thompson·Ricky Gibson·Ilya Vitebskiy·Filippo Capolino
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Abstract

We present a systematic methodology for designing slow-light photonic integrated circuits with a frozen mode based on a special kind of exceptional point of degeneracy (EPD) of order three named stationary inflection points (SIPs). This is realized through three-way coupled waveguides with lateral gratings operating at telecommunication wavelengths. We provide two designs and analyze sensitivity to geometric perturbations. We have fabricated a periodic waveguide with integrated taper loads and demonstrate reasonable agreement with full-wave simulations. These findings confirm the feasibility of integrating SIP-based delay functionalities in standard silicon photonic platforms.

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Albert Herrero-Parareda, Nathaniel Furman, Bradley J. Thompson, Ricky Gibson, Ilya Vitebskiy, Filippo Capolino. 2026-03-11. Frozen mode in coupled single-mode waveguides with gratings. https://arxiv.org/abs/2603.10286

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