A review on infiltrated or liquid core fiber optic SPR sensors

Fiber optic surface plasmon resonance (SPR) sensors are the miniaturized alternative to the conventional prism based SPR platform. Among its various types, microstructure optical fiber (MOF) sensors have recently gained immense popularity, owing to the possibility of a controlled or enhanced interaction between the guided light and sensing analyte. In this review, we discuss about the hollow MOFs utilized as liquid core SPR sensors that are particularly useful for detecting high refractive index analytes. The paper starts with a brief introduction to MOFs and SPR sensing principle. This is followed by a detailed discussion about the various fiber geometries as well as strategies applied to enhance the detection and their performance attributes. The reported literature has been categorized for this purpose based on the type of fibers used. Finally, the present concerns and future scopes of liquid infiltration-based MOF sensing technology are outlined.

Automated summary

This paper discusses the development of fiber optic surface plasmon resonance sensors and their applications in liquid core SPR sensing. It covers the structure and sensing principles of MOFs, different fiber geometries, and strategies for enhancing detection. The current challenges and future directions of liquid infiltration-based MOF sensing technology are outlined.