Abstract
This paper presents the design and optimization of a side-coupled photonic crystal nanobeam (1D PhC) cavity incorporating micro-ring resonators and a bus waveguide for efficient light coupling. The innovative design incorporates a parabolic taper function, ensuring gradual mode-gap modulation and robust light confinement. Through rigorous numerical simulations and optimization of key parameters—including the 1D PhC period, cavity center radius, taper delta radius, number of taper and mirror holes, waveguide width, ring radius, coupling gap distance, and material refractive index—we achieved a remarkable maximum Q factor of 2.5 × 105 at a wavelength of 1693.5 nm. This optimized configuration significantly enhances light-matter interaction, making it promising for applications demanding high-Q resonators.
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Zare, S.M., Ebnali-Heidari, M., Shayesteh, M.R. et al. Efficient side-coupling configuration for photonic crystal nanobeam cavities with micro-ring resonators. Opt Quant Electron 56, 692 (2024). https://doi.org/10.1007/s11082-024-06478-5
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DOI: https://doi.org/10.1007/s11082-024-06478-5