Plasmonic and Hybrid Whispering Gallery Mode–Based Biosensors: Literature Review

Detection limits in whispering gallery biosensors with plasmonic enhancement

Whispering Gallery Mode Resonators as Biosensors

The previous chapter introduces biosensor technologies according to the physical nature of their signal transduction processes. Optical biosensors are just one category that includes a wide array of novel devices. The present work deals with a technology based on whispering gallery mode (WGM) optical resonators [60, 61]. Understanding how they are fabricated and used is important for appreciati...

Hybrid plasmonic-photonic whispering gallery mode resonators for sensing: a critical review.

In this review we present the state of the art and the most recent advances in the field of optical sensing with hybrid plasmonic-photonic whispering gallery mode (WGM) resonators. After a brief introduction on the basic physics behind photonic WGM resonators and localized surface plasmon (LSP) nanostructures, we analyze the different types of optical sensors specifically designed for bulk refr...

Flow-Enhanced Transient Response in Whispering Gallery Mode Biosensors

Whispering gallery mode (WGM) optical resonator sensors are an extremely sensitive label-free technology for detecting the binding of biomolecules in solution. To better understand the fast transient response observed with these devices, we model mass transfer to spherical and toroidal WGM sensors of identical outer radius. Finite element simulations predict a 3-10 fold higher binding frequency...

Photoelectron imaging of modal interference in plasmonic whispering gallery cavities.

We use three-photon photoemission electron microscopy (PEEM) to investigate the interference of coherently excited dipolar and quadrupolar resonant modes of plasmonic whispering gallery resonators formed by circular grooves patterned into a flat Au surface. Optical scattering and cathodoluminescence spectroscopy are used to characterize the cavity resonance spectra for a wide range of cavity ra...