Claims
- 1. A periodic dielectric structure having a three-dimensional photonic bandgap comprising a plurality of stacked first and second two-dimensionally periodic slabs arranged in an alternating sequence, said first two-dimensionally periodic slabs comprising lower dielectric rods surrounded by higher dielectric material, said second two-dimensionally periodic slabs comprising higher dielectric rods surrounded by lower dielectric material, said rods of said first or second two-dimensionally periodic slabs being laterally offset from the rods of a nearest consecutive two-dimensionally periodic slab of the same type.
- 2. The structure of claim 1, wherein said first and second two-dimensionally periodic slabs have triangular lattice symmetry.
- 3. The structure of claim 1, wherein said first and second two-dimensionally periodic slabs have square lattice symmetry.
- 4. The structure of claim 1, wherein said offsets are configured such that the rods of said first or second two-dimensionally periodic slabs are laterally aligned with rods of a third consecutive slab of the same type.
- 5. The structure of claim 1, wherein said offsets are configured such that the rods of said first or second two-dimensionally periodic slabs are laterally aligned with rods of a fourth consecutive slab of the same type.
- 6. The structure of claim 1, wherein said offsets are configured such that the rods of said first or second two-dimensionally periodic slabs are laterally aligned with rods of a second consecutive slab of the same type.
- 7. The structure of claim 1, wherein said lower dielectric material or lower dielectric rods comprise air.
- 8. The structure of claim 1, wherein said higher or lower dielectric rods have a generally hexagonal cross section.
- 9. The structure of claim 1, wherein said higher or lower dielectric rods have a generally square cross section.
- 10. The structure of claim 1, wherein said higher or lower dielectric rods have a generally circular cross section.
- 11. The structure of claim 1, wherein said bandgap includes wavelengths less than 5 μm.
- 12. The structure of claim 1, wherein said bandgap includes wavelengths greater than 10 μm.
- 13. The structure of claim 1, wherein said first or second two-dimensionally periodic slabs includes a defect.
- 14. A method of fabricating a dielectric structure having a three-dimensional photonic bandgap comprising:
(a) providing a first layer of a first material; (b) forming a first two-dimensionally periodic array of holes in said first layer; (c) filling said holes with a second material; (d) providing a subsequent layer of said first material on said previous layer of first material and said filled holes; (e) forming a second two-dimensionally periodic array of holes that penetrates through and below said layer; and (f) repeating one or more of steps (c)-(e) a number of times to form a multi-layered structure.
- 15. The method of claim 14, wherein said first material comprises a higher dielectric material than said second material.
- 16. The method of claim 14, wherein said second material comprises a higher dielectric material than said first material.
- 17. The method of claim 14, wherein said first or second material is removed.
- 18. The method of claim 14 further comprising bonding said multi-layered structure to another multi-layered structure.
- 19. The method of claim 14, wherein said first and second two-dimensionally periodic arrays have triangular lattice symmetry.
- 20. The method of claim 14, wherein said first and second two-dimensionally periodic arrays have square lattice symmetry.
- 21. The method of claim 14, wherein the holes of step (e) are laterally offset from the holes of step (b) or the holes of subsequent steps (e).
- 22. The method of claim 21, wherein the offsets are configured such that the holes of step (e) are laterally aligned with the holes of the third consecutive step (e).
- 23. The method of claim 21, wherein the offsets are configured such that the holes of step (e) are laterally aligned with the holes of the fourth consecutive step (e).
- 24. The method of claim 21, wherein the offsets are configured such that the holes of step (e) are laterally aligned with the holes of the second consecutive step (e).
- 25. The method of claim 14, wherein said holes have a generally hexagonal cross section.
- 26. The method of claim 14, wherein said holes have a generally square cross section.
- 27. The method of claim 14, wherein said holes have a generally circular cross section.
- 28. The method of claim 14, wherein said multi-layered structure comprises a plurality of stacked first and second two-dimensionally periodic slabs arranged in an alternating sequence, said first two-dimensionally periodic slabs comprising lower dielectric rods surrounded by higher dielectric material, said second two-dimensionally periodic slabs comprising higher dielectric rods surrounded by lower dielectric material, said rods of said first or second two-dimensionally periodic slabs being laterally offset from the rods of a nearest consecutive two-dimensionally periodic slab of the same type.
- 29. The method of claim 14, wherein at least one of said two-dimensionally periodic array of holes includes a defect.
PRIORITY INFORMATION
[0001] This application claims priority from provisional application Ser. No. 60/224,049 filed Aug. 9, 2000.
Provisional Applications (1)
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Number |
Date |
Country |
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60224049 |
Aug 2000 |
US |