Structures incorporating polymer-inorganic particle blends

• US 7,226,966 B2
• Filed: 02/25/2002
• Issued: 06/05/2007
• Est. Priority Date: 08/03/2001
• Status: Expired due to Fees

• Current Assignee: NeoPhotonics Corporation (Lumentum Holdings Inc.)
• Original Assignee: Nanogram Corporation (Teijin Limited)
• Inventors: Kambe, Nobuyuki, Honeker, Christian C.
• Primary Examiner(s): Cain; Edward J.
• Application Number:
  US10/083,967
• Publication Number:
  US 20030031438A1
• Time in Patent Office: 1,926 Days
• Field of Search: 359/237, 359/299, 359/321, 359/341.1, 359/341.5, 385/50, 385/51, 385/5, 385/15, 385/130, 385/131, 385/132, 385/133, 385/141, 385/143, 385/145, 385/147, 524/428, 524/430, 524/432, 524/492
• US Class Current: 524/432
• CPC Class Codes: B82Y 20/00 Nanooptics, e.g. quantum optics or photonic crystals
• CPC Class Codes: G02B 1/02 made of crystals, e.g. rock-salt, semi-conductors G02B1/08 takes precedence
• CPC Class Codes: G02B 1/045 Light guides
• CPC Class Codes: G02B 6/1221 made from organic materials
• CPC Class Codes: G02B 6/1225 comprising photonic band-gap structures or photonic lattices
• CPC Class Codes: G02F 2202/32 Photonic crystals
• CPC Class Codes: Y10T 428/2982 Particulate matter [e.g., sphere, flake, etc.]

Abstract

Polymer-inorganic particle blends are incorporated into structures generally involving interfaces with additional materials that can be used advantageously for forming desirable devices. In some embodiments, the structures are optical structures, and the interfaces are optical interfaces. The different materials at the interface can have differences in index-of-refraction to yield desired optical properties at the interface. In some embodiments, structures are formed with periodic variations in index-of-refraction. In particular, photonic crystals can be formed. Suitable methods can be used to form the desired structures.

Claims

1. An optical structure comprising a first optical material and a second optical material each of which comprises a polymer with the first optical material having an interface with the second optical material, the first optical material comprising a polymer-inorganic particle blend and the second optical material comprising a polymer-inorganic particle blend, wherein the blend comprises inorganic particles and wherein the first optical material has a different index-of-refraction than the second optical material at infrared, visible or ultraviolet wavelengths and wherein the index-of-refraction of the first optical material varies spatially due to changes in the particle loadings, changes in inorganic particle composition or both.

2. The optical structure of claim 1 wherein the two materials differ in values of index-of-refraction between each other by at least about 0.005 at infrared, visible or ultraviolet wavelengths.

3. The optical structure of claim 1 wherein the two materials differ in values of index-of-refraction between each other by at least about 0.1 at infrared, visible or ultraviolet wavelengths.

5. The optical structure of claim 1 wherein the polymer-inorganic particle blend comprises a polymer-inorganic particle mixture.

6. The optical structure of claim 1 wherein the polymer-inorganic particle blend comprises a polymer-inorganic particle composite.

7. The optical structure of claim 1 wherein the polymer inorganic-particle blend comprises inorganic particles comprising elemental metal or elemental metalloid, i,e, un-ionized elements, metal/metalloid oxides, metal/metalloid nitrides, metal/metalloid carbides, metal/metalloid sulfides or combinations thereof.

8. The optical structure of claim 1 wherein the polymer inorganic-particle blend comprises a polymer selected from the group consisting of polyamides (nylons), polyimides, polycarbonates, polyurethanes, polyacrylonitrile, polyacrylic acid, polyacrylates, polyacrylamides, polyvinyl alcohol, polyvinyl chloride heterocyclic polymers, polyesters, modified polyolefins, polysilanes, polysiloxane (silicone) polymers, and copolymers and mixtures thereof.

9. The optical structure of claim 1 wherein the second optical material comprises no more than about 5 weight percent inorganic particles.

10. The optical structure of claim 1 wherein the second optical material comprises at least about 10 weight percent inorganic particles.

11. The optical structure of claim 1 wherein the first optical material comprises at least about 10 weight percent inorganic particles.

12. The optical structure of claim 1 wherein the first optical material comprises at least about 25 weight percent inorganic particles.

13. The optical structure of claim 1 wherein the inorganic particles have an average particle size of no more than about 1 micron.

14. The optical structure of claim 1 wherein the inorganic particles comprises metal/metalloid oxide particles.

15. The optical structure of claim 1 wherein the blend comprises inorganic particles and wherein the inorganic particles have an average particle size of no more than about 1 micron and wherein essentially no inorganic particles have a diameter greater than about five times the average particle diameter and wherein the inorganic particles comprise metal oxide.

16. The structure of claim 15 wherein the inorganic particles are electrically conducting.

45. The structure of claim 1 wherein essentially no inorganic particles have a particle diameter greater than about four times the average particle diameter.

46. The structure of claim 1 wherein the inorganic particles have a distribution of diameters with at least about 95 percent of the primary particles having a diameter greater than about 60 percent of the average diameter and less than about 140 percent of the average diameter.

47. The structure of claim 1 wherein the inorganic particles have an average particle diameter of no more than about 100 nm.

48. The optical structure of claim 1 wherein the inorganic particles comprise a metal nitride or silicon nitride.

4. An optical structure comprising a first optical material and a second optical material each of which comprises a polymer with the first optical material having an interface with the second optical material, the first optical material comprising a polymer-inorganic particle blend and the second optical material comprising a polymer-inorganic particle blend, wherein the blend comprises inorganic particles, wherein the first optical material has a different index-of-refraction than the second optical material at infrared, visible or ultraviolet wavelengths and wherein the polymer-inorganic particle blend has a non-liner optical response at infrared, visible or ultraviolet wavelengths.

17. The structure of claim 4 wherein the inorganic particles have an average particle size of no more than about 500 nm.

18. The structure of claim 4 wherein the inorganic particles have an average particle size of no more than about 100 nm.

49. The structure of claim 4 wherein essentially no inorganic particles have a particle diameter greater than about four times the average particle diameter.

50. The structure of claim 4 wherein the inorganic particles have a distribution of diameters with at least about 95 percent of the primary particles having a diameter greater than about 60 percent of the average diameter and less than about 140 percent of the average diameter.

51. The optical structure of claim 4 wherein the inorganic particles comprise a metal nitride or silicon nitride.

19. A structure comprising a first material and a second material each of which comprises a polymer with the first material having an interface with the second material, the first material comprising a polymer-inorganic particle blend, wherein the blend comprises inorganic particles comprising metal nitride or metalloid nitride and wherein the inorganic particles have an average particle size of no more than about 1 micron.

21. The structure of claim 19 wherein the first material and the second material are optical materials and wherein the two materials differ in values of index-of-refraction between each other by at least about 0.005 at infrared, visible or ultraviolet wavelengths.

22. The structure of claim 19 wherein the first material and the second material are optical materials and wherein the two materials differ in values of index-of-refraction between each other by at least about 0.1 at infrared, visible or ultraviolet wavelengths.

23. The structure of claim 19 wherein the polymer-inorganic particle blend has a non-linear optical response at infrared, visible or ultraviolet wavelengths.

24. The structure of claim 19 wherein the particle-inorganic particle blend comprises a polymer-inorganic particle mixture.

25. The structure of claim 19 wherein the particle-inorganic particle blend comprises a polymer-inorganic particle composite.

26. The structure of claim 19 wherein the second material comprises a polymer-inorganic particle blend.

27. The structure of claim 19 wherein the first material comprises at least about 10 weight percent inorganic particles.

28. The structure of claim 19 wherein the inorganic particles comprise a metal nitride.

29. The structure of claim 19 wherein the inorganic particles comprise silicon nitride.

30. The structure of claim 19 wherein essentially no inorganic particles have a particle diameter greater than about four times the average particle diameter.

31. The structure of claim 19 wherein the inorganic particles have a distribution of diameters with at least about 95 percent of the primary particles having a diameter greater than about 60 percent of the average diameter and less than about 140 percent of the average diameter.

32. The structure of claim 19 wherein the polymer inorganic-particle blend comprises a polymer selected from the group consisting of polyamides (nylons), polyimides, polycarbonates, polyurethanes, polyacrylonitrile, polyacrylic acid, polyacrylates, polyacrylamides, polyvinyl alcohol, polyvinyl chloride, heterocyclic polymers, polyesters, modified polyolefins, polysilanes, polysiloxane (silicone) polymers, and copolymers and mixtures thereof.

20. A structure comprising a first material and a second material each of which comprises a polymer with the first material having an interface with the second material, the first material comprising a polymer-inorganic particle blend, wherein the blend comprises inorganic particles comprising a metal/metalloid compounds with a dopant and wherein the inorganic particles have an average particle size of no more than about 1 micron.

33. The structure of claim 20 wherein the first material and the second material are optical materials and wherein the two materials differ in values of index-of-refraction between each other by at least about 0.005 at infrared, visible or ultraviolet wavelengths.

34. The structure of claim 20 wherein the first material and the second material are optical materials and wherein the two materials differ in values of index-of-refraction between each other by at least about 0.1 at infrared, visible or ultraviolet wavelengths.

35. The structure of claim 20 wherein the polymer-inorganic particle blend has a non-linear optical response at infrared, visible or ultraviolet wavelengths.

36. The structure of claim 20 wherein the particle-inorganic particle blend comprises a polymer-inorganic particle mixture.

37. The structure of claim 20 wherein the particle-inorganic particle blend comprises a polymer-inorganic particle composite.

38. The structure of claim 20 wherein the second material comprises a polymer-inorganic particle blend.

39. The structure of claim 20 wherein the first material comprises at least about 10 weight percent inorganic particles.

40. The structure of claim 20 wherein the inorganic particles comprise a metal oxide or a metal nitride.

41. The structure of claim 20 wherein the dopant comprises Ho, Eu, Ce, Tb, Dy, Er, Yb, Nd, La, Y, Pr, Tm, Bi, Sb, Zr, Pb, Li, Na, K, Ba, B, Ge, W, Ca, Cr, Ga, Al, Mg, Sr, Zn, Ti, Ta, Nb, Mo, Th, Cd, Sn or combinations thereof.

42. The structure of claim 20 wherein essentially no inorganic particles have a particle diameter greater than about four times the average particle diameter.

43. The structure of claim 20 wherein the inorganic particles have a distribution of diameters with at least about 95 percent of the primary particles having a diameter greater than about 60 percent of the average diameter and less than about 140 percent of the average diameter.

44. The structure of claim 20 wherein the polymer inorganic-particle blend comprises a polymer selected from the group consisting of polyamides (nylons), polyimides, polycarbonates, polyurethanes, polyacrylonitrile, polyacrylic acid, polyacrylates, polyacrylamides, polyvinyl alcohol, polyvinyl chloride, heterocyclic polymers, polyesters, modified polyolefins, polysilanes, polysiloxane (silicone) polymers, and copolymers and mixtures thereof.