Optimization of light-analyte interaction in Si3N4/polymer hybrid waveguide for sensitive sensing of pyridine vapor with ppb-level detection limit

Zhao, Kangfei; Dong, Lianghai; Zheng, Youbin; Deng, Guowei; Li, Zhonghui; Qu, Shi‐Wei; Chen, Kaixin; Wu, Jieyun

doi:10.1016/j.snb.2022.133104

Cited by 5 publications

(2 citation statements)

References 43 publications

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“…Therefore, Cd-HCIA-1 sensing materials demonstrated good anti-interference capabilities against other interfering substances of the same type. Response time is key to fluorescent probe detection applications, and many experiments report only one time frame for response [37][38][39] without giving an exact response time. We used microcalorimetry to monitor the response time of the quenching process of NB@Cd-HCIA-1 systems containing different concentrations of NB solution (Fig.…”

Section: Fluorescence Sensing Characteristicsmentioning

confidence: 99%

The high fluorescence sensitivity property and quenching mechanism of one-dimensional Cd-HCIA-1 sensor for nitrobenzene

Song

Dong

Hou

et al. 2023

Phys. Chem. Chem. Phys.

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Section: Fluorescence Sensing Characteristicsmentioning

confidence: 99%

The high fluorescence sensitivity property and quenching mechanism of one-dimensional Cd-HCIA-1 sensor for nitrobenzene

Song

Dong

Hou

et al. 2023

Phys. Chem. Chem. Phys.

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“…One of the challenges arises from the insufficient presence of light in the cladding for interactions with the analyte. Regular channel MZIs address this challenge by utilizing the analyte as the cladding 14 , 15 for strong effective index or phase modulation. It is not applicable to strip-loaded waveguides, where light is only weakly guided in the low-index strip atop the guiding layer, which serves to induce a local effective index change on the slab mode.…”

Section: Introductionmentioning

confidence: 99%

Strip-loaded Mach–Zehnder interferometer for absolute refractive index sensing

Doughan,

Oyemakinwa,

Ovaskainen

et al. 2024

Sci Rep

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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$$\%$$ % 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$$_2$$ 2 thin film on a silicon dioxide wafer and a 1.2 $$\upmu $$ μ m wide for 800 nm-thick nLOF resist served as loading strip. The sensing area featured a 10 $$\upmu $$ μ 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$$^{-6}$$ - 6 .

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Study of sensing mechanism of heterocyclic hazardous vapors with Metal Phthalocyanines

2023

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Optimization of light-analyte interaction in Si3N4/polymer hybrid waveguide for sensitive sensing of pyridine vapor with ppb-level detection limit

Cited by 5 publications

References 43 publications

The high fluorescence sensitivity property and quenching mechanism of one-dimensional Cd-HCIA-1 sensor for nitrobenzene

The high fluorescence sensitivity property and quenching mechanism of one-dimensional Cd-HCIA-1 sensor for nitrobenzene

Strip-loaded Mach–Zehnder interferometer for absolute refractive index sensing

Study of sensing mechanism of heterocyclic hazardous vapors with Metal Phthalocyanines

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