A micrometer-sized spherical microcavity, the photonic dot, is made from se
miconductor nanocrystals, the quantum dots. The coupling of electronic and
photonic states is demonstrated for a single photonic dot by the observatio
n of whispering gallery modes in the spectrum of spontaneous emission of th
e embedded CdSe quantum dots. (C) 2000 American Institute of Physics. [S000
3-6951(00)00311-9].