Advances in interferometric sensors for the detection of food contaminants

Optical biosensors could play a crucial role in food analysis, allowing for the highly sensitive and rapid detection of harmful substances at the point-of-need. Within the realm of optical biosensors, interferometric ones excel in their ability for multiplexing analysis and portability, enabling their use at the point-of-need. This review provides a thorough overview of optical interferometric biosensors, primarily focusing on developments during the last decade for the detection of various food contaminants. It covers optical techniques designed to enhance sensitivity and achieve portability through integration of various optical and non-optical components into a device along with the respective recognition elements. In summary, the review highlights the ongoing efforts to develop novel and robust optical interferometric systems and outlines the future trends to meet the demanding requirements for their application in the field of food safety.