Investigation of a novel silicon-on-insulator Rib-Slot photonic sensor based on the vernier effect and operating at 3.8 µm

Troia, Benedetto; Passaro, Vittorio M. N.

doi:10.2971/jeos.2014.14005

Cited by 10 publications

(7 citation statements)

References 23 publications

(30 reference statements)

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“…The lower the value of this point, the higher is the accuracy. Figures (2)(3)(4) show that new CSM algorithm produce correct values for SO2, CO, and CO2 down to 7.8x10 -6 %, 1.7x10 -6 %, and 2x10 -3 % respectively. Figures (3,4) show that levels of CO2 and CO detected by the new CSM algorithm differ slightly compared to those obtained by the CLS approach.…”

Section: Test Of the Validity Of The New Algorithmmentioning

confidence: 99%

“…Figures (2)(3)(4) show that new CSM algorithm produce correct values for SO2, CO, and CO2 down to 7.8x10 -6 %, 1.7x10 -6 %, and 2x10 -3 % respectively. Figures (3,4) show that levels of CO2 and CO detected by the new CSM algorithm differ slightly compared to those obtained by the CLS approach. The level of CO is slightly underestimated whereas the value of CO2 is slightly overestimated.…”

Section: Test Of the Validity Of The New Algorithmmentioning

confidence: 99%

“…Preserving the environment is one of the most important necessities of scientific research, which includes the atmosphere, water resources, and agricultural soil. With industrial progress, the importance of early detection of different types of pollutants increases, and this requires high accuracy and sensitivity [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

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Environmental pollution detection: A novel chirped spectral modulation algorithm for a more accurate monitoring of gas pollutants in the atmosphere

Shalaby

Alorifi

2023

J. Eur. Opt. Society-Rapid Publ.

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This work presents a new technique based on modulating the IR absorbance of each element in a mixture in a chirped manner to reduce the effect of their partial spectral absorption overlap on the accuracy of determining their concentrations. This Chirped Spectral Modulation CSM algorithm can deal with mixtures containing unknown elements rather than the elements whose concentrations are aimed. This novel algorithm, when compared to existing pattern recognition techniques, makes it easy to analyze the constituents of a mixture with high accuracy in the presence of traces of unknown components. It is found that the new algorithm can detect the presence of gas pollutants such as sulfur dioxide, carbon monoxide, carbon dioxide, nitrogen dioxide in a sample containing many other unknown polluting elements. This new algorithm is tested on air samples composed of predetermined percentages of air constituents and the results of calculations are compared with those of Classical Least Squares CLS pattern recognition algorithm. The comparison showed that the new algorithm can detect down to very small traces of harmful gases such as NO2, and SO2, at least one order of magnitude less than those detected by the CLS approach. Finally, the new algorithm is used to examine collected air samples from an industrial zone, and in the middle and at the exit of a road tunnel in Riyadh area which showed that the percentages of sulfur dioxide, nitrogen dioxide, and carbon monoxide are well below the safe levels.

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Section: Test Of the Validity Of The New Algorithmmentioning

confidence: 99%

Section: Test Of the Validity Of The New Algorithmmentioning

confidence: 99%

See 1 more Smart Citation

Environmental pollution detection: A novel chirped spectral modulation algorithm for a more accurate monitoring of gas pollutants in the atmosphere

Shalaby

Alorifi

2023

J. Eur. Opt. Society-Rapid Publ.

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“…To this purpose, several strategies can be taken into account such as the design and fabrication of two different guiding structures to be used for the isolated and sensible RRs, respectively. For example, a designer can decide to use slot waveguides optimized for homogeneous or surface sensing into the sensible area and conventional strip/rib waveguides for the rest of the chip [ 17 , 36 ]. Similarly, the reference RR of the Vernier device can be based on standard silicon nanowire while the sensing RR based on suspended silicon nanowires with an homogeneous sensitivity

even higher than 1, with

the variation of the effective index of the propagating optical mode induced by Δ

, i.e.…”

Section: Design Strategies and Device Fabricationmentioning

confidence: 99%

Design Procedure and Fabrication of Reproducible Silicon Vernier Devices for High-Performance Refractive Index Sensing

Troia

Khokhar

Nedeljkovic

et al. 2015

Sensors

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In this paper, we propose a generalized procedure for the design of integrated Vernier devices for high performance chemical and biochemical sensing. In particular, we demonstrate the accurate control of the most critical design and fabrication parameters of silicon-on-insulator cascade-coupled racetrack resonators operating in the second regime of the Vernier effect, around 1.55 μm. The experimental implementation of our design strategies has allowed a rigorous and reliable investigation of the influence of racetrack resonator and directional coupler dimensions as well as of waveguide process variability on the operation of Vernier devices. Figures of merit of our Vernier architectures have been measured experimentally, evidencing a high reproducibility and a very good agreement with the theoretical predictions, as also confirmed by relative errors even lower than 1%. Finally, a Vernier gain as high as 30.3, average insertion loss of 2.1 dB and extinction ratio up to 30 dB have been achieved.

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“…In this context, a novel silicon-on-insulator rib-slot photonic sensor based on the Vernier effect and operating at the operative wavelength λ op , has been theoretically investigated [ 30 ]. The sensing architecture is assumed to be fabricated on 6-inch SOI wafers with 400 nm-thick silicon layer on 2 μm-thick buried oxide layer, using conventional e-beam lithography and inductively coupled plasma (ICP) etching.…”

Section: Recent Advances In Vernier Effect-based Photonic Sensorsmentioning

confidence: 99%

Recent Advances in Gas and Chemical Detection by Vernier Effect-Based Photonic Sensors

Notte

Troia

Muciaccia

et al. 2014

Sensors

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Recently, the Vernier effect has been proved to be very efficient for significantly improving the sensitivity and the limit of detection (LOD) of chemical, biochemical and gas photonic sensors. In this paper a review of compact and efficient photonic sensors based on the Vernier effect is presented. The most relevant results of several theoretical and experimental works are reported, and the theoretical model of the typical Vernier effect-based sensor is discussed as well. In particular, sensitivity up to 460 μm/RIU has been experimentally reported, while ultra-high sensitivity of 2,500 μm/RIU and ultra-low LOD of 8.79 × 10−8 RIU have been theoretically demonstrated, employing a Mach-Zehnder Interferometer (MZI) as sensing device instead of an add drop ring resonator.

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Investigation of a novel silicon-on-insulator Rib-Slot photonic sensor based on the vernier effect and operating at 3.8 µm

Cited by 10 publications

References 23 publications

Environmental pollution detection: A novel chirped spectral modulation algorithm for a more accurate monitoring of gas pollutants in the atmosphere

Environmental pollution detection: A novel chirped spectral modulation algorithm for a more accurate monitoring of gas pollutants in the atmosphere

Design Procedure and Fabrication of Reproducible Silicon Vernier Devices for High-Performance Refractive Index Sensing

Recent Advances in Gas and Chemical Detection by Vernier Effect-Based Photonic Sensors

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