Design and analysis of highly sensitive prism based surface plasmon resonance optical salinity sensor

Realization of prism-based surface plasmon resonance sensor for detection of methane gas

“…Additionally, the sensitivity, quality factor and accuracy of detection of multilayer optical sensor with BK7 prism for detection of methane are examined in Table 2 and 3. According to Figure (3), the sensing materials of pure water and methane have been analysed on a multilayer optical sensing chip with BK7 prism, and the resonance angle of pure water is shifted to 68.8 degree, and the resonance angle of methane is shifted to 64.41 degree and 62.58 degree at 90K and 111K temperatures, with RI of methane is 1.2908 and 1.2720 21 respectively. For such a specifically designed multilayer chip, the sensitivity, accuracy of detection and quality factor of methane at 90K temperature are 109.20398, 1.069428, and 26.60267 and at 111K temperature are 105.4237, 1.054237 and 17.86843 respectively.…”

“…The entire reflection EW matches the surface plasmon wave (SPW) wave vector, and the light energy is transmitted to efficiently activate the SPR. As a result, SPR has been utilized for a variety of sensing purposes in a broad range of disciplines, including gas, biology, chemistry, and environmental medicine [2][3][4] . Methane gas detection with a graphene-based long-period fibre grating (LPFG)-based SPR sensor has been reported.…”

Design and Analysis of GO Coated High Sensitive Tunable SPR Sensor for OATR Spectroscopic Biosensing Applications

“…In case of chemical detection, Methanol has an RI of 1.3291, Acetonitrile has an RI of 1.3441, and Diethyl ether has an RI of 1.353 [58]. Salinity in water also varies the sample RI from 1.330 to 1.337 for concentrations from 0% to 30% [7]. To investigate the performance parameters, first we've varied the metal layer thickness from 30 to 60 nm with a step size of 5 nm to acquire the optimum trade-off between all performance parameters.…”

“…Regarding practical sensing ap-plications, surface plasmon resonance technology has piqued the interest of numerous scientist groups and leading the way of optical sensing owing to its significant advantages over conventional biosensors, which include higher sensitivity, simplicity of use, and lower cost, real-time rapid labelfree detection [2]. It has a wide range of applications in the biosensing industry, including detection, analysis, and characterization of biomolecules, chemicals, environmental VOLUME 4, 2016 protection, human blood group, glucose, bacteria, living cell analysis, DNA hybridization, water, and food safety, etc., which have a direct bearing on human health [3]- [7]. Biosensors based on this technology are still on the play for early detection of new emerging viruses like SARS-CoV 2 [8].…”

“…The Kretschmann prism coupling is the best for modeling the arrangement where it comprises a prism of low RI like BK7, CaF 2 , or SF10 and a thin coating of metal such as gold (Au), copper (Cu), silver (Ag), aluminum (Al), etc. The dielectric constant of metal is the prime determinant to picking the suitable metal to design the sensor where in between Au and Ag, the two most common metals for these types of configurations, the latter one can generate a narrower and more acute SPR curve due to its small optical damping, and sharper resonance peak with little to no interband transmission at the visible region [7]. In contrast, the Au layer's low molecule binding capacity restricts the Au-based SPR sensor's performance.…”