Topological insulator protected optical elements

Patent metadata

Field	Value
Publication number	US-10845506-B2
Application number	US-201715815549-A
Country	US
Kind code	B2
Filing date	Nov 16, 2017
Priority date	Nov 16, 2017
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

Abstract

Provided is a coated optical element that includes: an optical element; and a coating disposed on the optical element. The coating includes at least one layer of a topological insulator.

First claim

What is claimed is:

1. A coated optical element comprising:
an optical element comprising an optical characteristic, the optical characteristic being one of high optical transmittance of at least 90% from about 350 nm to about 750 nm and low Fresnel reflection loss of less than about 3 percent from about 350 nm to about 750 nm; and
a coating disposed on a surface of the optical element, wherein the coating comprises at least one layer comprising at least one topological insulator, the at least one topological insulator comprising a plurality of topological insulator nanotubes, and wherein the coating does not substantially alter the optical characteristic of the optical element.

2. The coated optical element of claim 1 , wherein the at least one layer comprises a thickness greater than about 20 nm.

3. The coated optical element of claim 1 , wherein the coating exhibits an optical transmittance of at least about 95 percent at wavelengths from about 200 nm to about 800 nm.

4. The coated optical element of claim 1 , wherein the coating does not comprise graphene.

5. The coated optical element of claim 1 , wherein the at least one topological insulator comprises bismuth (Bi).

6. The coated optical element of claim 1 , wherein the topological insulator comprises samarium hexaboride.

7. The coated optical element of claim 1 , wherein the topological insulator comprises a two-dimensional topological insulator.

8. The coated optical element of claim 1 , wherein the topological insulator comprises one or more topological insulator sheets.

9. The coated optical element of claim 3 , wherein the at least one layer comprises a thickness of greater than 100 nm.

10. The coated optical element of claim 1 , wherein the topological insulator comprises a plurality of topological insulator nanotubes and wherein the plurality of topological insulator nanotubes have a horizontal orientation.

11. The coated optical element of claim 1 , wherein the topological insulator comprises a plurality of topological insulator nanotubes and wherein the topological insulator nanotubes have a vertical orientation.

12. The coated optical element of claim 1 , wherein the optical characteristic being one of high optical transmittance of at least 95% from about 350 nm to about 750 nm and low Fresnel reflection loss of less than about 1 percent from about 350 nm to about 750 nm.

13. The coated optical element of claim 1 , wherein the optical characteristic being one of high optical transmittance of at least 98% from about 350 nm to about 750 nm and low Fresnel reflection loss of less than about 0.1 percent from about 350 nm to about 750 nm.

14. An apparatus comprising:
a coated optical element comprising an optical element and a coating disposed on a surface of the optical element,
wherein the optical element comprises an optical characteristic, the optical characteristic being one of high optical transmittance of at least 90% from about 350 nm to about 750 nm and low Fresnel reflection loss of less than about 3 percent from about 350 nm to about 750 nm,
wherein the coating comprises at least one layer comprising a topological insulator, the one topological insulator comprises a plurality of topological insulator nanotubes,
wherein the coating does not substantially alter the optical characteristic of the optical element, and
wherein the coated optical element is exposed to an external environment of the apparatus.

15. The apparatus of claim 14 , wherein the topological insulator comprises a two-dimensional topological insulator.

16. The apparatus of claim 14 , wherein the at least one layer comprises a thickness of from about 20 nm to about 200 nm.

17. The apparatus of claim 14 , wherein the coating does not comprise graphene.

18. The apparatus of claim 14 , wherein the topological insulator comprises bismuth (Bi).

19. The apparatus of claim 14 , wherein the topological insulator comprises samarium hexaboride.

20. The apparatus of claim 14 , wherein the coating exhibits an optical transmittance of at least about 95 percent at wavelengths from about 200 nm to about 800 nm.

Assignees

• Boeing Co

Inventors

• Hunt Jeffrey H
• Li Angela W
• Howe Wayne R

Classifications

• H01B3/025 Primary

  Other inorganic material · CPC title

• G02B1/14 Primary

  Protective coatings, e.g. hard coatings · CPC title

• G02B1/02

  made of crystals, e.g. rock-salt, semi-conductors (G02B1/08 takes precedence) · CPC title

• G02B1/002

  made of materials engineered to provide properties not available in nature, e.g. metamaterials · CPC title

• B82Y20/00

  Nanooptics, e.g. quantum optics or photonic crystals · CPC title