Modification of spontaneous emission of a single InAs quantum dot is demons
trated using an epitaxial distributed Bragg reflector microcavity that has
been post-growth processed into microposts. The micropost structure isolate
s single quantum dots within the microcavity resonance, and creates a three
-dimensionally (3D) confined photonic cavity. Discrete mode structure from
the 3D cavity is observed, as well as the coupling of a single quantum dot
to one of these modes in the weak coupling cavity QED regime.