Ultra-sensitive refractive index sensing using a hybrid photonic crystal external cavity laser and the optical heterodyne technique
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Accepted Version
Date
2025-04-17
Authors
Oliveira, Taynara
Iadanza, Simone
Vorobev, A. S.
Kotlyar, Maria V.
O’Faolain, Liam
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Published Version
Abstract
This study presents a breakthrough in refractive index sensing by combining a silicon nitride 1D photonic crystal cavity in a hybrid external cavity laser with the optical heterodyne technique. Achieving ~10⁻⁷ RIU detection limit, which represents 400x improvement in detection capability over existing highsensitivity devices.
Description
Keywords
Photonic Crystal Cavity (PhC) , Hybrid laser , Heterodyne , Detection limit (DL)
Citation
Oliveira, T.A., Iadanza, S., Vorobev, A.S., Kotlyar, M.V. and O’Faolain, L. (2025) 'Ultra-sensitive refractive index sensing using a hybrid photonic crystal external cavity laser and the optical heterodyne technique', IEEE Silicon Photonics Conference (SiPhotonics), London, England 14-17 April, pp. 1-2.
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© 2025, IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.