Common path interferometeric analysis of a planar polymer optical waveguide having adlayer of 2D materials for biosensing applications

Upadhyay, Abhishek; Yadav, Chandan; Sharma, Gaurav; Kumar, Sushil; Singh, Vivek

doi:10.1007/s11082-021-02986-w

Cited by 4 publications

(3 citation statements)

References 31 publications

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“…Cross-selectivity refers to the effect of additional measurands in the molecular on the sensing of a speci c measurand [19][20]. The selectivity coe cients/factor (K) of the target molecule to another molecule is de ned as: K=\frac{{S}_{C}}{{S}_{R}} (7) where S C and S R are the sensitivities of the speci ed target molecule (pure chlorpyrifos) and another target molecule (real sample), respectively.…”

Section: Selectivitymentioning

confidence: 99%

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MoS2 coated planar polymer optical waveguide sensor utilizing common path interferometric principle for chlorpyrifos detection

Upadhyay

Yadav

Maurya

et al. 2022

Preprint

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A common path Mach-Zehnder interferometer is fabricated using planer polymer waveguide having MoS2 as an adlayer for chlorpyrifos detection. The dispersion characteristic and cutoff condition of proposed waveguide is obtained theoretically and hence the cutoff film thickness is optimised to get TE0 and TM0 propagating modes. Variation between the phase shift of propagating modes with the concentration of pure chlorpyrifos and its real commercial sample are obtained. A good linear variation between phase shift and concentration of chlorpyriphos is obtained in our fabricated waveguide for all considered temperatures. The obtained maximum sensitivity, minimum limit of detection and limit of quantification of chlorpyrifos is 5.66 degree/µM, 1.57µM and 5.24µM respectively, at 450C. The capability of the fabricated sensor to generate distinct response for pure and real sample of chlorpyrifos at different concentration and temperature were confirmed by principal component analysis. Since the response of sensor is better for real sample at lower temperature, therefore it is recommended that the concentration of chlorpyrifos in real sample should be measure at low temperature.

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Section: Selectivitymentioning

confidence: 99%

“…are available for such detection [7]. These sensing techniques are based on exploitation of propagating or localized electromagnetic mode, which is generated by the con nement of electromagnetic waves in dielectric and/or metal structure.…”

Section: Introductionmentioning

confidence: 99%

MoS2 coated planar polymer optical waveguide sensor utilizing common path interferometric principle for chlorpyrifos detection

Upadhyay

Yadav

Maurya

et al. 2022

Preprint

Self Cite

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“…Optical waveguide explosive vapor sensors with different structures and materials have been successfully demonstrated due to the advantages of large-scale integration, low cost, high sensitivity and anti-electromagnetic interference [33,[40][41][42]. However, optical waveguide sensors for explosive detection in water are less extensively studied [43] because the refractive index of water is much smaller than most waveguide materials, making it difficult to use high-sensitivity refractive index sensors in water [44,45].…”

Section: Introductionmentioning

confidence: 99%

Sensitive Evanescence-Field Waveguide Interferometer for Aqueous Nitro-Explosive Sensing

Wang

Deng

et al. 2023

Chemosensors

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The development of novel chemical nitro-explosive sensors with high sensitivity, low cost and a compact size is essential for homeland security, environmental protection and addressing military challenges. Polymeric optical waveguides based on refractive index sensing are widely used in biochemical detection due to their advantages of large-scale integration, low cost, high sensitivity and anti-electromagnetic interference. In this study, we designed and fabricated a polymer waveguide Mach–Zehnder interferometer (MZI) sensor to detect 2,4-dinitrotoluene (DNT) in water. One phase shifter of the MZI waveguide was functionalized by coating a thin cladding layer of polycarbonate with dipolar chromophores and used as the sensing arm; the other arm was coated with passive epoxy resin cladding and used as the reference arm. The phase difference between the two arms of the MZI was modulated using the refractive index (RI) change in the polycarbonate cladding when dipolar chromophores interacted with electro-deficient DNT. The theoretical sensitivity of the designed MZI can reach up to 24,696 nm/RIU. When used for explosive detection, our fabricated sensor had a maximum wavelength shift of 4.465 nm and good linear relation, with an R2 of 0.96 between the wavelength shift and a concentration ranging from 3.5 × 10−5 to 6.3 × 10−4 mol/L. The sensitivity of our device was 6821.6 nm/(mol/L). The design of an unbalanced MZI sensor, together with the sensing material, provides a new approach to using low-cost, compact and highly sensitive devices for in-field explosive detection.

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Experimental detection of chlorpyrifos by MoS2 coated planar polymer waveguide sensor utilizing common path interferometric principle

Upadhyay

Yadav

Maurya

et al. 2023

Optik

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Common path interferometeric analysis of a planar polymer optical waveguide having adlayer of 2D materials for biosensing applications

Cited by 4 publications

References 31 publications

MoS2 coated planar polymer optical waveguide sensor utilizing common path interferometric principle for chlorpyrifos detection

MoS2 coated planar polymer optical waveguide sensor utilizing common path interferometric principle for chlorpyrifos detection

Sensitive Evanescence-Field Waveguide Interferometer for Aqueous Nitro-Explosive Sensing

Experimental detection of chlorpyrifos by MoS2 coated planar polymer waveguide sensor utilizing common path interferometric principle

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