3D printed graded refractive index device
A 3D printed GRIN device, the formulation and the method for making the GRIN device are disclosed. The GRIN (graded-index) device comprises i) a first phase comprising at least one polymer; ii) a second phase comprising at least one first component; and, optionally, iii) an interface between the first phase and the second phase, wherein the interface has a concentration gradient of the at least one first component, whereby the concentration of the at least one first component decreases with distance away from the second phase towards the first phase, wherein the at least one first component comprises at least one functional component, at least one functional precursor component, or combinations thereof, and wherein the GRIN device is a functional GRIN device, a functional precursor GRIN device, or a combination of a functional and functional precursor GRIN device.
1. A GRIN (graded-index) device comprising:
i) a first phase comprising at least one polymer formed by vat polymerization of a substantially homogeneous mixture of a monomer and at least one first component;
ii) a second phase comprising the at least one first component; and,
iii) an interface between the first phase and the second phase, wherein the interface has a uniform concentration gradient of the at least one first component, whereby the concentration of the at least one first component decreases with distance away from the second phase towards the first phase,
whereby as the vat polymerization occurs, the at least one first component diffuses away from a focused region of polymerization in the mixture thereby forming in the GRIN device the interface having the uniform concentration gradient of the at least one first component,
wherein the at least one first component comprises at least one functional component, at least one functional precursor component, or combinations thereof, and
wherein the device is a functional device, a functional precursor device, or a combination of a functional and functional precursor device.
2. The device of claim 1 , wherein the device is a lens, an antenna or both a lens and an antenna.
3. The device of claim 1 , wherein the device has one or more of a permittivity in a range of 1 to 5, a dielectric constant in a range of 1 to 5, a dielectric loss in a range of 0 to 10%, a dielectric loss tangent in a range of 0.0001 to 0.05 and a gain in a range of 0 to 6 dB.
4. The device of claim 1 , wherein each phase has a gradient of continuous variations in refractive index.
5. The device of claim 1 , wherein the at least one first component comprises one or more of ceramic particles and ceramic precursors.
6. The device of claim 5 , wherein the ceramic is one or more of BaTiO 3 (BT), Pb(Mg 1/3 Nb 2/3 )O 3 (PMN), Pb(Zr 0.52 Ti 0.48 )O 3 (PZT), piezoelectric crystals (PMN-PT), barium strontium titanate (BST), BaTi 4 O 9 —ZnO, ZnFe 2 O 4 , CaCu 3 TiO 4 O 12 , a ZnAl 2 O 4 —TiO 2 -based material, a Mg 2 SiO 4 -based material, a Mg 4 Ta 2 O 9 -based material, an Al 2 O 3 -based material and any other metal oxides.
7. The device of claim 1 , wherein the at least one first component comprises one or more of a ferroelectric material, a ferromagnetic material, an integrated circuit, a piezoelectric nanoparticle and a quantum dot.
8. The device of claim 1 , wherein the at least one first component comprises embedded graphene periodic structures, carbon nanotubes and boron nitride nanotubes.
9. The device of claim 1 , wherein the at least one first component comprises one or more of a metal, a metal precursor, a metalloid and a metalloid precursor selected from the group consisting of metal salts, metal oxides, metal coordination compounds, organometallic compounds, organometalloid compounds and combinations thereof.
10. The device of claim 1 , wherein the at least one first component comprises one or more of a metal formate, a metal acetate, a metal propionate, a metal butyrate, a metal pentanoate, a metal hexanoate, a metal heptanoate, a metal ethylhexanoate, a metal behenate, a metal benzoate, a metal oleate, a metal octanoate, a metal nonanoate, a metal decanoate, a metal neodecanoate, a metal hexafluoroacetylacetonate, a metal phenylacetate, a metal isobutyrylacetate, a metal benzoylacetate, a metal pivalate and a metal oxalate, and the metal is one or more of aluminum, silver, gold, platinum, titanium and copper.
11. The device of claim 1 , wherein the at least one first component is at least one second polymer.
12. The device of claim 11 , wherein the second polymer comprises one or more of a conducting polymer, a porous polymer and a polymer foam.
13. The device of claim 1 , wherein concentration of the at least one polymer in the interface decreases with distance away from the first phase towards the second phase.
14. The device of claim 1 , wherein the second phase is one or more of a concentration gradient, a coating and a composite.