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1

Analysis of a metal clad waveguide sensor having metamaterial as a guiding layer

Upadhyay A., Prajapati Y. K., Tripathi R., Singh V., Saini J. P.

Opto-Electronics Review

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2016

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Vol. 24, No. 2

47--57

EN

In this study a metal clad waveguide sensor with a metamaterial guiding layer is analyzed. Sensitivity of the proposed sensor is derived using dispersion and Fresenal’s equations for waveguiding mode and reflection mode. While efficiently analyzing and comparing the results with the existing one, some interesting findings are achieved. It is observed that the proposed sensor shows larger cover layer sensitivity and larger adlayer sensitivity compared to the dielectric guiding layer sensor due to adsorbtive properties of metamaterial. Henceforth, it concludes that the proposed sensor shows sensitivity improvement over a dielectric guiding layer sensor.

2

Sensitivity enhancement of metamaterial-based surface plasmon resonance biosensor for near infrared

Pal S., Prajapati Y. K., Saini J. P., Singh V.

Optica Applicata

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2016

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Vol. 46, nr 1

131--143

EN

The present study investigates the angular response and sensitivity of a surface plasmon resonance biosensor with metamaterial, by taking the advantage of the remarkable property of metamaterials. The proposed biosensor numerically shows that silver with a metamaterial layer enhances the sensitivity. The thickness of metamaterial and silver layer has been optimized. On comparing these results with a conventional surface plasmon resonance biosensor, it is observed that the sensitivity of the proposed biosensor is improved by introducing the metamaterial. The proposed biosensor has a sensitivity 6.3124 times higher than that of the conventional surface plasmon resonance sensor.

3

Thinned fibre Bragg grating as a fuel adulteration sensor : simulation and experimental study

Agarwal S., Prajapati Y. K., Mishra V.

Opto-Electronics Review

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2015

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Vol. 23, No. 4

231-238

EN

This paper presents the implementation of a thinned fibre Bragg grating as a fuel adulteration sensor for volatile organic compounds. The proposed sensor can detect upto 10% adulteration of benzene, toluene and xylene: hydrocarbons precisely, whereas traditional methods can detect only upto 20% adulteration. The results obtained from the experiments are verified using Finite Difference Time Domain method. It is found that experimental results have very less deviation from simulation results. The proposed sensor provides us with the new possibility that may have commercial application, as well.