ArticleSensors (Basel, Switzerland)2018
Investigation of Grating-Assisted Trimodal Interferometer Biosensors Based on a Polymer Platform.
Article in Sensors (Basel, Switzerland), 2018. 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.
- Inverse-Designed Silicon Nitride Bimodal Mode Converter for Interferometric Sensors.Nanophotonics (Berlin, Germany) · 2026Article
- Design of a novel hybrid multimode interferometer operating with both TE and TM polarizations for sensing applications.Optical and quantum electronics · 2023Article
- High-Order Multimode Waveguide Interferometer for Optical Biosensing Applications.Sensors (Basel, Switzerland) · 2021Article
- Low-Finesse Fabry-Pérot Interferometers Applied in the Study of the Relation between the Optical Path Difference and Poles Location.Sensors (Basel, Switzerland) · 2020Article
- Trimodal Waveguide Demonstration and Its Implementation as a High Order Mode Interferometer for Sensing Application.Sensors (Basel, Switzerland) · 2019Article
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Authors and funding
4 authors.
Funding
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Abstract
A grating-assisted trimodal interferometer biosensor is proposed and numerically analyzed. A long period grating coupler, for adjusting the power between the fundamental mode and the second higher order mode, is investigated, and is shown to act as a conventional directional coupler for adjusting the power between the two arms. The trimodal interferometer can achieve maximal fringe visibility when the powers of the two modes are adjusted to the same value by the grating coupler, which means that a better limit of detection can be expected. In addition, the second higher order mode typically has a larger evanescent tail than the first higher order mode in bimodal interferometers, resulting in a higher sensitivity of the trimodal interferometer. The influence of fabrication tolerances on the performance of the designed interferometer is also investigated. The power difference between the two modes shows inertia to the fill factor of the grating, but high sensitivity to the modulation depth. Finally, a 2050 2π/RIU (refractive index unit) sensitivity and 43 dB extinction ratio of the output power are achieved.
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