ABSTRACT
Surface plasmon resonance (SPR)-dependent plasmonic sensors have significantly employed a detection approach in a broad range of applications, including clinical diagnostics, food quality checking, organic and synthetic analyte recognition, bioimaging, telemedicine, disease detection, water, salinity testing, and real-time monitoring. The remarkable characteristics of photonic crystal fibers (PCFs) mark their existence in different applications ranging from human life to the industrial phase. PCF-based plasmonic sensors are more sensitive than conventional SPR optical sensors in terms of sensitivity with high-resolution ability. This chapter gives an overview of the fundamentals of PCF, including the basic mechanism of the plasmonic sensor. Plasmonic sensors depend on different PCF structures, such as single-coated, double-coated, and slotted sensors, and are reviewed with their advantages and drawbacks. This review also briefly discusses medical applications of plasmonic sensors, their limitations, and the future scope for advanced sensing technology.
