Photonic crystals with nanowire-based fabrication
View Patent ↗Fabrication of a photonic crystal is described. A patterned array of nanowires is formed, the nanowires extending outward from a surface, the nanowires comprising a catalytically grown nanowire material. Spaces between the nanowires are filled with a slab material, the patterned array of nanowires defining a patterned array of channels in the slab material. The nanowire material is then removed from the channels.
1. A method for fabricating a photonic crystal, comprising:
forming a patterned array of nanowires extending outward from a surface, the nanowires comprising a catalytically grown nanowire material;
filling in spaces between the nanowires with a slab material, the patterned array of nanowires defining a patterned array of channels in the slab material;
removing the nanowire material from the channels; and
filling the channels with a channel material, said channel material and said slab material having different refractive indexes.
2. The method of claim 1 , wherein said channel material comprises a liquid.
3. The method of claim 2 , said liquid comprising a first material compound dissolved or suspended therein and having a refractive index controllable according to a concentration of said first material compound, whereby a photonic bandgap characteristic of the photonic crystal can be at least partially controlled by controlling said concentration.
4. The method of claim 2 , wherein the refractive index of at least one of said channel material and said slab material is variable according to external application of at least one of control radiation, temperature variation, pressure variation, electric field variation, and mechanical stress for facilitating external control of a photonic bandgap characteristic of the photonic crystal.
5. A photonic crystal fabricated by forming a first dielectric material slab embedded in an array of catalytically grown nanowires that are subsequently sacrificed in favor of a second dielectric material having a different refractive index than the first dielectric material, wherein said second dielectric material comprises one of air, a liquid solution, a colloidal suspension, and a solid.
6. A photonic crystal fabricated by forming a first dielectric material slab embedded in an array of catalytically grown nanowires that are subsequently sacrificed in favor of a second dielectric material having a different refractive index than the first dielectric material, wherein said second dielectric material comprises a liquid including an index-modifying compound dissolved or suspended therein such that a refractive index of the liquid is controllable according to a concentration of said index-modifying compound, whereby a photonic bandgap characteristic of the photonic crystal can be at least partially controlled by controlling said concentration.