Highly sensitive SPR PCF biosensors based on Ag/TiN and Ag/ZrN configurations

Photonic–Plasmonic Nanostructures for Solar Energy Utilization and Emerging Biosensors

“…Hossain et al developed a quasi-D-shaped external Au-coated PCF with significant amplitude sensitivity toward biological samples in the wavelength range of 1080-1560 nm [75]. Label-free PCFs based on Ag/TiN and Ag/ZrN configurations exhibit high sensitivity and linearity for quasitransverse magnetic and electric modes, which can detect unknown analytes as biological sensing devices [76]. Wang et al introduced a large surface-to-volume ratio (SPR-PCF) with a silver-graphene layer lining, which is highly sensitive for refractive index dynamic detection ranges of 1.39-1.46 compared to previously described PCFs [77].…”

Detection of kerosene adulteration in automobile fuel by a low-loss surface plasmon resonance (SPR) chemical sensor

“…The energy received by the optical fiber probe can be attenuated substantially to even render it undetectable in practice. The minimum losses of the sensors and the corresponding resonance wavelengths 36–102 are calculated and shown in Fig. 10.…”

“…25 Different types of PCF-SPR sensors have been designed recently, 26 including the photonic band gap bers, Bragg bers, 27 holey bers, and hole-assisted bers. 28 Materials such as ZnO, ITO, TiN and graphene [29][30][31] have been applied to such sensors. However, they are rarely used in the detection of adulteration in liquid fuels.…”

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

“…7(b), the resonance wavelength remains almost unchanged for two channels, while the resonance intensity decreases from 124.1700 to 49.5493 dB/cm for L-channel and diminishes from 255.9930 to 112.7286 dB/cm for R-channel as r2 increases from 0.18 to 0.22 µm with a step of 0.01 µm. It can be explained by the fact that a large air hole located in the center can lower the effective RI of core mode [37], leading to the RI difference of the core mode and cladding mode reducing, which causes more energy leakage from the dual-core to metal surfaces. On the contrary, the equivalent RI of the PCF cladding decreases with the increase of r2, corresponding to the RI difference enlarging, resulting in more energy being confined in the dual-core.…”