A surface plasmon resonance sensor based on concave-shaped photonic crystal fiber for low refractive index detection

Hexagonal two layers-photonics crystal fiber based on surface plasmon resonance with gold coating biosensor easy to fabricate

“…Several studies related to PCF-SPR have been reported, some of which have complex structures and geometries that are difficult to fabricate as reported by Yang et al PCF-SPR has a concave geometric structure that has low confinement loss values and wavelength sensitivity (WS). High that is 10,700 nm/RIU [33], the H-shaped PCF-SPR was also reported by Han et al and it was found that the sensor sensing range was very large and the WS was obtained at 25,900 nm/RIU [34], further research conducted by sakib demonstrated The PCF-SPR is in the form of a slot circuit and it is found that the WS is 16,000 nm/RIU [35]. Rahman et al reported a PCF-SPR with a gold layer surrounding the microchannels having a WS of 25,000 nm/RIU [36].…”

Milled Microchannel-Assisted Open D-Channel Photonic Crystal Fiber Plasmonic Biosensor

“…The highest SA of the sensor is found to be 328 RIU -1 . [12] D-shaped 20,000 1.18-1.36 [35] Concave shaped 10,700 1.19-1.29 [36] D-shape 15,000 1.22-1.33 [9] Square lattice 40,000 The effect of metal layer thickness variations has been studied on the SA and depicted in Fig. 8 (a) and (b).…”

Research on Dual-Channel and Dual-core Plasmonic Sensor Based Photonic Crystal Fiber for Refractive Index Sensing

“…Due to the high sensitivity of SPR to the change in the refractive index (RI) of surrounding environment [3], it can be used to analyze the concentration, affinity constant and specificity caused by the absorption of the target molecules [4,5]. As a result, the SPR sensors have made great progress in the environmental monitoring [6], medical diagnosis [7], biotechnology [8], food safety [9] be-cause of high sensitivity, high specificity and label-free dete-ction [10,11]. Usually, SPR can be excited by traditional prism-coupled configuration based Kretschmann, but the Kretschmann structure has large volume and is not suitable for real-time and remote sensing [12,13].…”