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Efficient side-coupling configuration for photonic crystal nanobeam cavities with micro-ring resonators

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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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Authors and Affiliations

  1. Department of Electrical Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran

    Seyed Mohammad Zare, Mohammad Reza Shayesteh & Maryam Nayeri

  2. Faculty of Engineering, Shahrekord University, Shahrekord, 8818634141, Iran

    Majid Ebnali-Heidari

  3. Department of Physics Education, Farhangian University, P.O. Box 14665-889, Tehran, Iran

    Aliakbar Ebnali-Heidari

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Author Agreement Statement We the undersigned declare that this manuscript is original, has not been published before and is not currently being considered for publication elsewhere. We confirm that the manuscript has been read and approved by all named authors and that there are no other persons who satisfied the criteria for authorship but are not listed. We further confirm that the order of authors listed in the manuscript has been approved by all of us. We understand that the Corresponding Author is the sole contact for the Editorial process. He is responsible for communicating with the other authors about progress, submissions of revisions and final approval of proofs. Seyed Mohammad ZareMohammad Reza ShayestehMajid Ebnali-HeidariAliakbar Ebnali-HeidariMaryam Nayeri.

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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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