Here we present results on Bragg diffraction in the optical range from indi
um phosphide infilled solid face-centered-cubic silica colloidal crystals.
Scanning electron microscopy and optical properties indicate that the semic
onductor is homogeneously grown within the three-dimensional lattice of voi
ds in the colloidal crystal. The photonic-crystal behavior of the periodic
dielectric is enhanced as a result of the high contrast of dielectric const
ants when InP is introduced. [S0163-1829(98)02848-3].