ArticleMaterials (Basel, Switzerland)2025
High Sensitivity Design for Silicon-On-Insulator-Based Asymmetric Loop-Terminated Mach-Zehnder Interferometer.
Article in Materials (Basel, Switzerland), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Advances in Photonic Gas Sensors Operating in the VIS-NIR Spectrum: Structures, Materials, and Performance.Sensors (Basel, Switzerland) · 2026Review
- A Coupled Resonator Optical Waveguide-Based Refractive Index Sensor Employing Sagnac Loop Reflectors.Sensors (Basel, Switzerland) · 2026Article
- Experimental Characterization of a Silicon Nitride Asymmetric Loop-Terminated Mach-Zehnder Interferometer with a Refractive Index-Engineered Sensing Arm.Nanomaterials (Basel, Switzerland) · 2025Article
- Emerging Trends in Thermo-Optic and Electro-Optic Materials for Tunable Photonic Devices.Materials (Basel, Switzerland) · 2025Review
- Integrated Photonic Biosensors: Enabling Next-Generation Lab-on-a-Chip Platforms.Nanomaterials (Basel, Switzerland) · 2025Review
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Abstract
This work presents a novel design for an asymmetric loop-terminated Mach-Zehnder interferometer (a-LT-MZI) based on a silicon-on-insulator (SOI) platform, tailored for refractive index (RI) sensing applications. A significant advantage of incorporating the Sagnac loop into the MZI configuration is its ability to reduce the interferometer's effective length by half, offering a more compact design. This makes it ideal for integration into miniaturized optical devices, enabling space-efficient configurations without compromising precision or performance. The proposed device, featuring a pathlength difference (∆L) of 24.35 µm demonstrates a sensitivity of 261 nm/RIU, which is further enhanced to 510 nm/RIU by incorporating a subwavelength (SWG) waveguide in the asymmetric sensing arm. This modification boosts light-matter interaction, resulting in a larger shift in the interference fringes and significantly improving the sensor's performance.
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