The advantages of the simultaneous quantum manipulation of electron an
d photon systems due to quantum-confined Stark effect and cavity quant
um electrodynamics, respectively, in semiconductor microstructures are
clarified, manifesting systematic experimental results on high transf
er efficiencies of spontaneous emissions and cavity-induced fractional
changes of exciton decay times around on-axis resonance. The scheme f
or the simultaneous quantum manipulation is also expected to lead to a
ttractive device concepts for highly efficient, high-speed spontaneous
light emitters, and sub-Poissonian photon generators in a short time
interval.