Photonic resonant microcavities for chemical and biochemical sensing

Nowadays, photonic sensors represent an efficient and intriguing solution for advanced chemical and biochemical sensing in liquid and gas. In this article, a detailed investigation of photonic sensors based on resonant microcavities is presented. Photonic device architectures, optical sensing principles, technologies and materials are presented, emphasizing their role in optical sensing mechanisms. In conclusion, interesting experimental results are reviewed in order to show the main applications of photonic resonant microcavities in several fields, such as medicine, chemistry and biotechnology, to name a few.