Multi-Layer Photonic Structures Having Omni-Directional Reflectivity and Coatings Incorporating The Same
First Claim
1. A multi-layer photonic structure comprising alternating layers of high index material and low index material having a form [H(LH)N] where H is a layer of high index material, L is a layer of low index material and N is a number of pairs of layers of high index material and layers of low index material, wherein:
- N is an integer ≧
1;
the low index dielectric material has an index of refraction nL from about 1.3 to about 2.5; and
the high index dielectric material has an index of refraction nH from about 1.8 to about 3.5, wherein nH>
nL and the multi-layer photonic structure comprises a reflectivity band of greater than about 200 nm for light having angles of incidence from about 0 degrees to about 80 degrees relative to the multi-layer photonic structure.
2 Assignments
0 Petitions
Accused Products
Abstract
A multi-layer photonic structure may include alternating layers of high index material and low index material having a form [H(LH)N] where, H is a layer of high index material, L is a layer of low index material and N is a number of pairs of layers of high index material and layers of low index material. N may be an integer ≧1. The low index dielectric material may have an index of refraction nL from about 1.3 to about 2.5. The high index dielectric material may have an index of refraction nH from about 1.8 to about 3.5, wherein nH>nL and the multi-layer photonic structure comprises a reflectivity band of greater than about 200 nm for light having angles of incidence from about 0 degrees to about 80 degrees relative to the multi-layer photonic structure. The multi-layer photonic structure may be incorporated into a paint or coating system thereby forming an omni-directional reflective paint or coating.
-
Citations
20 Claims
-
1. A multi-layer photonic structure comprising alternating layers of high index material and low index material having a form [H(LH)N] where H is a layer of high index material, L is a layer of low index material and N is a number of pairs of layers of high index material and layers of low index material, wherein:
-
N is an integer ≧
1;the low index dielectric material has an index of refraction nL from about 1.3 to about 2.5; and the high index dielectric material has an index of refraction nH from about 1.8 to about 3.5, wherein nH>
nL and the multi-layer photonic structure comprises a reflectivity band of greater than about 200 nm for light having angles of incidence from about 0 degrees to about 80 degrees relative to the multi-layer photonic structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 16)
-
-
9. A UV-IR reflective multilayer photonic structure comprising layers of high index material and low index material having a form [0.5 L H (LH)N 0.5 L] where H is a layer of high index dielectric material, L is a layer of the low index dielectric material and N is the number pairs of layers of high index material and layers of low index materials, wherein:
-
N is an integer ≧
1;the low index dielectric material has an index of refraction nL from about 1.3 to about 2.5; the high index dielectric material has an index of refraction nH from about 1.8 to about 3.5, wherein nH>
nL and, for angles of incidence from about 0 degrees to about 80 degrees, the multi-layer photonic structure comprises a reflectivity band greater than about 300 nm for light in the infrared spectrum, a reflectivity band greater than about 50 nm for light in the ultraviolet spectrum, and the multi-layer photonic structure is substantially transparent to visible light for angles of incidence from about 0 degrees to about 15 degrees. - View Dependent Claims (10, 11, 12, 13, 14, 15)
-
-
17. An article of manufacture comprising a broadband omni-directionally reflective coating with at least one reflectivity band comprising a bandwidth greater than about 250 nm for angles of light incident on the coating from about 0°
- to about 80°
, the coating comprising;a binder and a plurality of multi-layer photonic structures dispersed in the binder, wherein the multi-layer photonic structures have a range to mid-range value from about 20% to about 50% and at least one reflectivity band having a bandwidth greater than about 250 nm for angles of light incident on the multilayer photonic structure from about 0°
to at least about 45°
. - View Dependent Claims (18, 19, 20)
- to about 80°
Specification