Modelling of phase shift Bragg grating biosensor for non invasive detection of blood components

Sahu, Sourabh; Singh, Ghanshyam

doi:10.1109/icraie.2016.7939565

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…[ 77 ]. At the same time, optical biosensors are finding increasing applications because they provide a non-invasive way to measure the same quantities [ 76 , 78 , 79 , 80 , 81 ] and ease in converting optical signals into electrical form. Common examples of electrochemical and optical biosensors are employed in glucose meters, cholesterol meters, and oximetry, which represent commercial, daily-life applications of biosensors.…”

Section: Current-mode Sensor Interfaces For Bioelectrical Signal Cond...mentioning

confidence: 99%

A Survey on Current-Mode Interfaces for Bio Signals and Sensors

Scarsella

Barile

Stornelli

et al. 2023

Sensors

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In this study, a review of second-generation voltage conveyor (VCII) and current conveyor (CCII) circuits for the conditioning of bio signals and sensors is presented. The CCII is the most known current-mode active block, able to overcome some of the limitations of the classical operational amplifier, which provides an output current instead of a voltage. The VCII is nothing more than the dual of the CCII, and for this reason it enjoys almost all the properties of the CCII but also provides an easy-to-read voltage as an output signal. A broad set of solutions for relevant sensors and biosensors employed in biomedical applications is considered. This ranges from the widespread resistive and capacitive electrochemical biosensors now used in glucose and cholesterol meters and in oximetry to more specific sensors such as ISFETs, SiPMs, and ultrasonic sensors, which are finding increasing applications. This paper also discusses the main benefits of this current-mode approach over the classical voltage-mode approach in the realization of readout circuits that can be used as electronic interfaces for different types of biosensors, including higher circuit simplicity, better low-noise and/or high-speed performance, and lower signal distortion and power consumption.

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Section: Current-mode Sensor Interfaces For Bioelectrical Signal Cond...mentioning

confidence: 99%

A Survey on Current-Mode Interfaces for Bio Signals and Sensors

Scarsella

Barile

Stornelli

et al. 2023

Sensors

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“…In the present work, we have assumed the porosity p = 50% (suitable for the analyte size of 1 nm -10 nm), where the refractive index of bulk silicon (n Si ) and air (n air ) are 3.45 and 1, respectively. For finding the change in the refractive index of the porous silicon, we have considered three biomaterials which are blood plasma (n analyte = 1.35), hemoglobin (n analyte = 1.38), and biotin-streptavidin (n analyte = 1.45) [10]. The value of the refractive index of the PSi for blood plasma, hemoglobin, and biotin-streptavidin is plotted in Fig.…”

Section: Effective Refractive Index Approximation Of Psimentioning

confidence: 99%

“…The attached molecule alters the refractive index of the surface layer that changes the optical characteristics of the propagated signal [1][2][3]. In the last decade, several label-free biosensors based on the ring resonators, Bragg-grating resonators, slot waveguide, photonic crystal cavities, interferometer, and surface-plasmon-resonance were developed [3][4][5][6][7][8][9][10][11][12]. Most of these sensors utilize the planar strip and rib waveguide for device configuration that makes use of the evanescent field for detection.…”

Section: Introductionmentioning

confidence: 99%

Porous Silicon Based Bragg-Grating Resonator for Refractive Index Biosensor

et al. 2018

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Abstract:In this work, we have evaluated the biosensing capability of the porous silicon (PSi) based sidewall Bragg-grating resonator. The approximation of the quasi-TE mode full vector for the eigenmode calculation is performed using a full vector mode solver. The transmission spectra of the device are evaluated using the transfer matrix method. We have observed a shift in the resonant band for a change in the refractive index of biomaterial in the upper cladding region. The theoretical value of the bulk sensitivity is calculated to be 387.48 nm/RIU. The device is suitable for biosensing application due to its ability of interacting signal with the infiltrated analytes in the PSi waveguide core.

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