ArticleScientific reports2024
Strip-loaded Mach-Zehnder interferometer for absolute refractive index sensing.
Article in Scientific reports, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Article
- High Sensitivity Design for Silicon-On-Insulator-Based Asymmetric Loop-Terminated Mach-Zehnder Interferometer.Materials (Basel, Switzerland) · 2025Article
- Determination of mode strengths in channel waveguide from the complex electric field.Scientific reports · 2024Article
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Authors and funding
4 authors.
Funding
Abstract
This paper presents the design, fabrication, and characterization of a Mach-Zehnder interferometer (MZI) on a strip-loaded platform specifically developed for the measurement of refractive index variations in liquids. A novel approach of large opening in the sensing region enhances the sensitivity by using the analyte as the loading strip. This allows surpassing the performances of the conventional perforations and trenched-based MZIs and prevent protecting the reference arm. The implementation of this design resulted in a high confinement factor of approximately 23[Formula: see text] in the cladding, enabling an effective interaction between the evanescent field and analyte. Ethanol-water solutions with varying concentrations were used as analyte for the characterization of the device. The strip-loaded waveguide was a 200 nm TiO[Formula: see text] thin film on a silicon dioxide wafer and a 1.2 [Formula: see text]m wide for 800 nm-thick nLOF resist served as loading strip. The sensing area featured a 10 [Formula: see text]m wide open-ing in the loading material with a sensing length of 5 mm. The homogeneous sensitivity was experimentally determined to be 0.128, demonstrating the effectiveness of the proposed design, which enabled a refractive index change monitoring of 10[Formula: see text].
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Registered trials
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