Photonic crystals for laser action

In this study we inspect the possibilities of using photonic crystals and, in particular, opal structures as hosts for active materials with the view to achieve laser action in solid state devices. We then show our recent wor k in the characterization of both the opal structure as a host and an activ e material. Our characterization of the opal is done by both optical and mi croscopy techniques and results in the evidence of their fcc structure whic h is appropriate for the purpose. Inhibition of the spontaneous luminescenc e is demonstrated with a dye embedded in the structure. (C) 1999 Elsevier S cience B.V. All rights reserved.