Electrochemical Fabrication of 3D Microperiodic Porous Materials

3D periodic microstructures of high-refractive index materials(see Figure), in particular the II–VI semiconductors CdS and CdSe, have been synthesized by electrodeposition through silica- or polystyrene-based colloidal assemblies. The highest refractive index contrast is achieved after removal of the silica or polystyrene templates with HF or toluene, respectively.