Optical properties of microcavities with shell of J-aggregates
We report on development of active whispering-gallery microcavities integrated with shell of organic dye TTBC molecules in a J-aggregate state and Ag nanocrystals. We demonstrate that the emission intensity can be further enhanced by depositing a hybrid layer of J-aggregates and Ag nanoparticles onto the spherical microcavity. Owing to the concerted action of WGMs and plasmonic hot spots in the Ag aggregates, we observe an enhanced Raman signal from the J-aggregates. Microcavities covered by J-aggregates and plasmonic nanoparticles could be thus useful for a variety of photonic applications in basic science and technology.