Abstract

Optical microsphere resonators are attractive systems for both fundamental physics research in the field of cavity quantum electrodynamics and for the use in optoelectronic devices. So-called whispering-gallery modes of such cavities feature extreme photonic confinement with very small mode volume and a very high quality (or Q-) factor. Recently, novel light sources made from semiconductor nanoparticles as active material coupled to individual modes of microsphere resonators via the evanescent field, were proposed [1]. In experimental realizations of these light sources, it is very important to precisely control the coupling in order to achieve optimal coupling efficiency without degrading the Q-factor.

© 2000 IEEE