We present a comprehensive overview of sensor technology exploiting optical whispering
gallery mode (WGM) resonances. After a short introduction we begin by detailing the …

Optical whispering-gallery mode (WGM) microresonators, confining resonant photons in a
microscale volume for long periods of time, strongly enhance light-matter interactions …

Abstract Pure ZnO nanoparticles (NPs), ZnO/CuO and Al-ZnO/CuO nanocomposites (NCs)
were prepared using co-precipitation followed by sol–gel method. The structural and …

Compact and smart optical gas sensors have attracted significant attention over the past few
decades. Among the materials used for developing such gas sensors, group-IV materials …

Silicon photonic biosensors hold the potential for highly accurate, yet low cost point-of-care
devices. Maximizing the sensitivity of the sensing chips while reducing the complexity and …

Nowadays, optical devices and circuits are becoming fundamental components in several
application fields such as medicine, biotechnology, automotive, aerospace, food quality …

Whispering gallery mode resonators (WGMRs) have achieved significant results due to their
unique properties such as extremely small mode volume, ultra‐high quality (Q) factor, fast …

We report the fabrication of ammonia gas sensors operating at room temperature using
aligned one-dimensional orthorhombic molybdenum trioxide (α-MoO 3) nanorods. α-MoO 3 …

The optical response of a graphene oxide integrated silicon micro-ring resonator (GOMRR)
to a range of vapour phase Volatile Organic Compounds (VOCs) is reported. The response …

Portable and cost-effective gas sensors are gaining demand for a number of environmental,
biomedical, and industrial applications, yet current devices are confined into specialized …