We report studies of a novel microcavity system that combines a semiconductor quantum well with a fused-silica microsphere. We show that excitonic photoluminescence from the quantum well couples efficiently into whispering-gallery modes. Using a resonant light-scattering technique, we demonstrate that the <i>Q</i> factor of the combined system exceeds 10<sup>5</sup> . Our studies also point to the necessity of using semiconductor nanostructures with a capping layer no more than a few nanometers thick.
© 1999 Optical Society of America
Xudong Fan, Scott Lacey, and Hailin Wang, "Microcavities combining a semiconductor with a fused-silica microsphere," Opt. Lett. 24, 771-773 (1999)