CDS PHOTOLUMINESCENCE INHIBITION BY A PHOTONIC STRUCTURE

Here we present experimental evidence of the strong modification of th e CdS photoluminescence when it is embedded in a SiO2 colloidal photon ic crystal. When the emitted light matches a forbidden photonic band i n the matrix, inhibition of the semiconductor photoluminescence is ach ieved. In this work we prove the effective control of this effect by m eans of the photonic lattice parameter of the host. CdS was grown by c hemical bath deposition and its quality has been checked employing Ram an spectroscopy and x-ray diffraction. Scanning electron microscopy is used to study the morphology of the composite. (C) 1998 American Inst itute of Physics. [S0003-6951(98)01939-1].