General concepts about infill

Opal Composites

In order to expand the photonic crystal properties of artificial opals, and/or change their functionaity, high dielectric constant materials should be infiltrated in their pore lattice. See examples with

    Plain opals aren't dry The trivial: water
    Polymers
    Polymers
    Rhodamine

    Rhodamine 6G

    InP

    InP

    can be grown by CVD from metallorganic compounds

    ZnO

    ZnO

    is a material with extraordinary properties that can be grown in the framework of the opals by CVD.

    CdS

    CdS

    where the degree of infiltration is monitored,

    Germanium

    Germanium

    grown by wet and CVD methods and

    Silicon

    Silicon

    where full photonic band gaps are obtained.

    Si and Ge

    Si and Ge layers

    forming shells around the spheres can be grown. For these synthesis methods high temperatures are needed which
    impedes the use of organic beads. To circumvent this an intermediate step of silica growth ca be employed that can lead to onion-layer opals.

    Antimony

    Antimony Sulfide

    The highest energy complete photonic band gap so far has been achieved with Sb2S3 inverted opals that were obtained either by CBD or sulfidation of antimony oxide.