Chemical sensor based on the colorimetric response of porous silicon photonic crystal

Ivanov, I.I.; Skryshevsky, V. A.; Belarouci, Ali

doi:10.1016/j.sna.2021.113309

Cited by 9 publications

(3 citation statements)

References 89 publications

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“…The observed blue shift of the optical cavity mode (Figures and a) is a direct consequence of the uniform decreasing of the effective refractive indexes of each layer n L and n H along the pore axis due to polydesorption of the analyte from the pore walls. The results of simulation confirm this mechanism of desorption.…”

Section: Resultssupporting

confidence: 67%

Engineering Porous Silicon-Based Microcavity for Chemical Sensing

2023

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In this article, the authors theoretically and experimentally investigated ways to improve the efficiency of porous silicon (PS)-based optical microcavity sensors as a 1D/2D host matrix for electronic tongue/nose systems. The transfer matrix method was used to compute reflectance spectra of structures with different [n L n H ] sets of low n L and high n H bilayer refractive indexes, the cavity position λ c , and the number of bilayers N bi . Sensor structures were prepared by electrochemically etching a silicon wafer. The kinetics of adsorption/desorption processes of ethanol−water-based solution was monitored in real time with a reflectivity probe-based setup. It was theoretically and experimentally demonstrated that the sensitivity of the microcavity sensor is higher for structures with refractive indexes in the lower range (and the corresponding porosity values in the upper range). The sensitivity is also improved for structures with the optical cavity mode (λ c ) adjusted toward longer wavelengths. The sensitivity of a distributed Bragg reflector (DBR) with cavity increases for a structure with cavity position λ c in the long wavelength region. The full width at half maximum (fwhm c ) of the microcavity is smaller and the quality factor of microcavity (Q c ) is higher for the DBR with a larger number of structure layers N bi . The experimental results are in good agreement with the simulated data. We believe that our results can help in developing rapid, sensitive, and reversible electronic tongue/nose sensing devices based on a PS host matrix.

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Section: Resultssupporting

confidence: 67%

Engineering Porous Silicon-Based Microcavity for Chemical Sensing

2023

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“…The PhCs are now expanding numerous fields, such as quantum computing, biophotonics, and communications [11,[17][18][19]. The controllability of the PBG and optical properties depend on the use of prodigious materials, which can be modulated by external physical parameters such as magnetic field, voltage, temperature, and hydrostatic pressure [20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Studying the impact of interface roughness on a layered photonic crystal as a sensor

Zaky,

Al-Dossari,

Hendy

et al. 2023

Phys. Scr.

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This study investigates the impact of the interface roughness on a layered photonic crystal as a gas sensor based on Tamm resonance in the terahertz range. The well-known transfer matrix method is used for simulation. The sensor's performance is observed for various thicknesses of the rough layer (exponential-graded refractive index layer) between the adjacent layers. The rise in the rough layer between adjacent porous and cavity layers causes a decrease in sensitivity but enhances the quality factor and figure of merit of the proposed structure. However, the change in the thickness of the rough layer between the metallic and the last cavity layer does not affect the performance.

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“…Polymers, metals, semiconductors, liquid crystals, superconductors, metamaterials, and dielectrics are all utilized in the design of PhCs (Hadi Al-kadhemy et al 2014;Elsayed et al 2021;Wu 2021;Iwamoto et al 2021;Park et al 2021). The incorporation of porous silicon (PSi) layers in PhCs as a novel sensor design to improve sensitivity is the focus of recent research (Ivanov et al 2022;Van 2022). PSi layer is commonly fabricated by an electrochemical etching route.…”

Section: Introductionmentioning

confidence: 99%

One-dimentional periodic structure infiltrated by (PVA/CV + CF)-polymer for high-performance sensitivity

et al. 2022

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In the current work, we demonstrate a design to act as a Gamma-ray radiation dosimeter based on the one-dimensional photonic crystal (1D-PhC). The basic concept of the present dosimeter is based on a Porous Silicon (PSi) infiltrated by poly-vinyl alcohol (PVA)-polymer doped with crystal violet (CV) and carbol-fuchsine (CF) dyes. The mechanism of suggested dosimeter is based on the shift of the photonic bandgap (PBG) to higher wavelengths as exposed to gamma-ray radiation doses from 0 to 70 Gray (Gy). The basic axes of the current theoretical treatment are the transfers matrix method (TMM), Bruggeman's effective medium equation, and the fitted experimental data to the refractive index of the doped PVA-Polymer. The obtained results showed the proposed sensor is characterized by high stable sensitivity varied from (178–186 nm/ RIU) along an applied γ-dose from (10–70 Gy) in the visible range. In addition, we compared these results with previous researches. In addition, based on the our knowledge may be it is the first time that a 1D-PhC has been used for gamma-ray detection by using (PVA/CV + CF) based on Porous Silicon.

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Chemical sensor based on the colorimetric response of porous silicon photonic crystal

Cited by 9 publications

References 89 publications

Engineering Porous Silicon-Based Microcavity for Chemical Sensing

Engineering Porous Silicon-Based Microcavity for Chemical Sensing

Studying the impact of interface roughness on a layered photonic crystal as a sensor

One-dimentional periodic structure infiltrated by (PVA/CV + CF)-polymer for high-performance sensitivity

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