Designing Highly Sensitive Surface Plasmon Resonance Sensor With Dual Analyte Channels

Abstract

The ease of controlling waveguide properties through unparalleled design flexibility has made the photonic crystal fiber (PCF) an attractive platform for plasmonic structures. In this work, a dual analyte channel's highly sensitive PCF bio-sensor is proposed based on surface plasmon resonance (SPR). In the proposed design, surface plasmons (SPs) are excited in the inner flat portion of two rectangular analyte channels where gold (Au) strip is deposited. Thus, the surface roughness that might be generated during metal deposition on circular surface could be effectively reduced. Considering the refractive index (RI) change in the analyte channels, the proposed sensor is designed and fully characterized by the finite element method based COMSOL Multiphysics software. Improved sensing characteristics including wavelength sensitivity (WS) of 186,000 nm/RIU and amplitude sensitivity (AS) of 2,792.97 RIU −1 in the wide RI range of 1.30 to 1.43 is obtained. In addition, the proposed sensor exhibits excellent resolution of 5.38 × 10 −7 , signal to noise ration (SNR) of 13.44 dB, figure of merits (FOM) of 2188.23, detection limit (DL) of 101.05 nm, and detection accuracy (DA) of 0.0204 nm −1 . Outcomes of the analysis indicate that the proposed sensor could be suited for accurate detection of organic chemicals, bio-molecules, and biological analytes.INDEX TERMS plasmonic, bio-sensor, photonic crystal fiber, finite element method, detection lmimit

A Review of Recent Innovations in Remote Health Monitoring

“…In the preceding section, the various devices used in health monitoring are described in detail. This section is devoted to presenting the methods executed in these monitoring systems [43][44][45][46][47][48][49][50][51][52][53][54][55]. Specifically, refs.…”

“…Specifically, refs. [43][44][45][46][47][48] present channel characteristics studies for different mentioned devices whereas [49,50] are devoted to WCE advancements. Refs.…”

“…Lastly, we examine detection and imaging systems in [34][35][36][37][38][39][40][41][42], showcasing the versatile applications of remote health monitoring. The second part of this paper is dedicated to presenting the methods executed in these monitoring systems [43][44][45][46][47][48][49][50][51][52][53][54][55]. This section provides valuable insights into the methodology behind remote health monitoring.…”

“…This section provides valuable insights into the methodology behind remote health monitoring. Channel characteristics studies for different devices are thoroughly discussed in [43][44][45][46][47][48]. In addition, advancements in wireless capsule endoscopy (WCE) are addressed in [49,50], highlighting its significance in the context of remote health monitoring.…”

Numerical and Experimental Analysis of Side Polished Single Mode Fiber for Refractive Index Sensing

“…To check the performance of the proposed SP-SMF model, the sensitivity has been calculated which is the variation of refractive index occurs with the change of analytes and the voltage. The sensitivity (S) of the proposed model with respect to wavelength and the voltage has been measured by the following equation[33]:4 where is the variation of the refractive index, and is the change of voltage. Correspondingly, Fig.…”