Emission in a SnS2 inverted opaline photonic crystal

The photoluminescence of a dye embedded in the three-dimensional SnS2 inver ted opal has been studied. Changes of the emission spectrum compared with t he free-space dye emission was observed in the stop-band frequency range in accord with reflectance/transmission spectra of this photonic crystal. The angular-dependent component, due to the Bragg stop band, and the angular-i ndependent component, which is, possibly, related to the minimum in the den sity of photon states, have been distinguished in the dye emission spectrum . (C) 2001 American Institute of Physics.