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- W2076378387 abstract "In this paper, we propose a novel photonic integrated sensor characterized by the cascade of a ring resonator (RR) and a Mach-Zehnder interferometer (MZI) architecture with a Sagnac loop (i.e., RR-MZI-Sagnac). We present the modelling and detailed guidelines for the design of such devices that are assumed to be fabricated on complementary metal-oxide semiconductor (CMOS) compatible silicon-on-insulator (SOI) platforms. Ultra-high refractive index (RI) sensing performance such as wavelength sensitivities larger than 2.5 × 103 μm/RIU (RI unit) and limits of detection (LOD) of 1 × 10−8 RIU can be achieved by employing the Vernier effect in the near-infrared (NIR), around the wavelength of 1.55 μm. Furthermore, we theoretically demonstrate that the novel RR-MZI-Sagnac Vernier devices can operate better than the most performing state-of-the-art Vernier sensors characterized by cascaded RR and MZI (RR-MZI). In fact, an operating bandwidth that is half than that requested by the RR-MZI devices is exhibited when balanced MZIs are designed in both configurations, still preserving similar RI sensing performance. Alternatively, double RI sensing performance can be achieved by RR-MZI-Sagnac Vernier sensors with respect to RR-MZI devices when unbalanced MZIs are considered in both the Vernier configurations, exhibiting the same operating bandwidths. Finally, simulations reveal that ammonia (NH3) concentrations in the 0–30,000 ppm range and carbon dioxide (CO2) traces lower than 5,000 ppm can be detected in deionized water and air, respectively." @default.
- W2076378387 created "2016-06-24" @default.
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- W2076378387 date "1992-05-01" @default.
- W2076378387 modified "2023-10-18" @default.
- W2076378387 title "The force between molecules" @default.
- W2076378387 doi "https://doi.org/10.1016/0079-6816(92)90041-f" @default.
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