Optical Microresonators: Chip-Scale Fabrication of High-Q All-Glass Toroidal Microresonators for Single-Particle Label-Free Imaging (Adv. Mater. 15/2016).

On page 2945, R. H. Goldsmith and co-workers describe an all-glass, high-Q, low-mode-volume optical microresonator for label-free sensing and imaging, which overcomes scalability barriers and also brings other advantages, including optical transparency. By using the microresonators as transducers to detect heat dissipated by individual nano-objects upon photoexcitation, label-free single-particle imaging is demonstrated.