Patterned devices and related methods

• US 20070085098A1
• Filed: 03/07/2006
• Published: 04/19/2007
• Est. Priority Date: 10/17/2005
• Status: Abandoned Application

• Current Assignee: Luminus Devices Incorporated (Sanan Optoelectronics Company Limited)
• Original Assignee: Luminus Devices Incorporated (Sanan Optoelectronics Company Limited)
• Inventors: Lim, Michael, Lidorikis, Elefterios, Venezia, Jo, Erchak, Alexei, Nemchuk, Nikolay
• Application Number:
  US11/370,220
• Publication Number:
  US 20070085098A1
• Time in Patent Office: Days
• US Class Current: 257/95
• CPC Class Codes: B82Y 20/00 Nanooptics, e.g. quantum optics or photonic crystals
• CPC Class Codes: G02B 2006/1213 comprising photonic band-gap structures or photonic lattices
• CPC Class Codes: H01L 2933/0083 Periodic patterns for optical field-shaping in or on the semiconductor body or semiconductor body package, e.g. photonic bandgap structures
• CPC Class Codes: H01L 33/20 with a particular shape, e.g. curved or truncated substrate

Abstract

Devices, such as light-emitting devices (e.g., LEDs), and methods associated with such devices are provided. The device may include an interface having a dielectric function that varies spatially according to a transformed pattern, wherein the transformed pattern conforms to a transformation of a precursor pattern according to a mathematical function. A method is also provided for generating a pattern for incorporation in a device. The method comprises providing a precursor pattern, and transforming the precursor pattern according to a mathematical function, thereby generating a transformed pattern. Alternatively, or additionally, the device may include an interface having a dielectric function that varies spatially according to a transformed pattern, wherein the transformed pattern conforms to a transformation of a periodic precursor pattern according to a mathematical function. The mathematical function includes providing an angular displacement to features of the periodic precursor pattern, wherein the angular displacement depends on the radial distance of the features of the periodic precursor pattern with respect to a reference origin.

Claims

1. A device comprising:

an interface having a dielectric function that varies spatially according to a transformed pattern, wherein the transformed pattern conforms to a transformation of a precursor pattern according to a mathematical function.

2. The device of claim 1, wherein the device is a light-emitting device, and the interface is such that light emitted by the light-emitting device passes therethrough.

3. The device of claim 2, wherein the interface is an emission surface of the light-emitting device.

4. The device of claim 2, wherein the transformed pattern is arranged such that light emitted from the light-emitting device has a substantially isotropic emission pattern.

5. The device of claim 2, wherein the transformed pattern is arranged such that light emitted from the light-emitting device has an anisotropic emission pattern.

6. The device of claim 1, wherein the precursor pattern comprises a periodic pattern.

7. The device of claim 6, wherein the precursor pattern comprises a hexagonal pattern.

8. The device of claim 1, wherein the precursor pattern comprises a non-periodic pattern.

9. The device of claim 1, wherein the transformation comprises providing an angular displacement that at least depends on a radial distance from a reference origin.

10. The device of claim 1, wherein the mathematical function is function f(r) that depends on a radius r from a reference origin.

11. The device of claim 1, wherein the transformation comprises providing a displacement that at least depends sinusoidally on a distance from a reference axis.

12. The device of claim 1, wherein the transformation comprises providing a spatial compression along a reference axis.

13. The device of claim 1, wherein the transformation comprises providing a spatial elongation along a reference axis.

14. The device of claim 1, wherein the precursor pattern comprises a plurality of features, and wherein the transformation of a precursor pattern is applied to positions of the plurality of features of the precursor pattern.

15. The device of claim 1, wherein the transformed pattern comprises a plurality of holes formed in the interface.

16. The device of claim 1, wherein the transformed pattern is non-periodic.

17. The device of claim 1, wherein the transformed pattern is periodic.

18. A method of generating a pattern, the pattern provided for incorporation in a device, the method comprising:

providing a precursor pattern; and

transforming the precursor pattern according to a mathematical function, thereby generating a transformed pattern.

19. The method of claim 18, further comprising:

patterning an interface of a light-emitting device with the transformed pattern.

20. The method of claim 19, wherein the interface is an emission surface of the light-emitting device.

21. The method of claim 19, wherein the transformed pattern is arranged such that light emitted from the light-emitting device has a substantially isotropic emission pattern.

22. The method of claim 19, wherein the transformed pattern is arranged such that light emitted from the light-emitting device has an anisotropic emission pattern.

23. The method of claim 18, wherein the precursor pattern comprises a periodic pattern.

24. The method of claim 23, wherein the precursor pattern comprises a hexagonal pattern.

25. The method of claim 18, wherein the precursor pattern comprises a non-periodic pattern.

26. The method of claim 18, wherein the transformation comprises providing an angular displacement that at least depends on a radial distance from a reference origin.

27. The method of claim 18, wherein the mathematical function is function f(r) that depends on a radius r from a reference origin.

28. The method of claim 18, wherein the transformation comprises providing a displacement that at least depends sinusoidally on a distance from a reference axis.

29. The method of claim 18, wherein the transformation comprises providing a spatial compression along a reference axis.

30. The method of claim 18, wherein the transformation comprises providing a spatial elongation along a reference axis.

31. The method of claim 18, wherein the precursor pattern comprises a plurality of features, and wherein the transformation of a precursor pattern is applied to positions of the plurality of features of the precursor pattern.

32. The method of claim 18, wherein the patterning of the interface of the light-emitting device with the transformed pattern comprises forming a plurality of holes in the interface.

33. The method of claim 18, wherein the transformed pattern is non-periodic.

34. The method of claim 18, wherein the transformed pattern is periodic.

35. A device comprising:

an interface having a dielectric function that varies spatially according to a transformed pattern, wherein the transformed pattern conforms to a transformation of a periodic precursor pattern according to a mathematical function,

wherein the mathematical function comprises providing an angular displacement to features of the periodic precursor pattern, and wherein the angular displacement depends on the radial distance of the features of the periodic precursor pattern with respect to a reference origin.

36. The device of claim 35, wherein the device is a light-emitting device.

37. The device of claim 36, wherein the interface is an emission surface of the light-emitting device.

38. The device of claim 35, wherein the pattern comprises a plurality of holes formed at the interface.

39. The device of claim 36, wherein the transformed pattern is arranged such that light emitted from the light-emitting device has a substantially isotropic emission pattern.

40. The device of claim 36, wherein the transformed pattern is arranged such that light emitted from the light-emitting device has an anisotropic emission pattern.

41. The device of claim 35, wherein the periodic precursor pattern comprises a hexagonal pattern.

42. The device of claim 35, wherein the periodic precursor pattern comprises a plurality of features, and wherein the transformation of a periodic precursor pattern is applied to positions of the plurality of features of the periodic precursor pattern.

43. The device of claim 35, wherein the transformed pattern is non-periodic.

44. The device of claim 35, wherein the transformed pattern is periodic.

45. A method of generating a pattern, the pattern provided for incorporation in a device, the method comprising:

providing a periodic precursor pattern; and

transforming the periodic precursor pattern according to a mathematical function, thereby generating a transformed pattern,

wherein the mathematical function comprises providing an angular displacement to features of the periodic precursor pattern, and wherein the angular displacement depends on the radial distance of the features of the periodic precursor pattern with respect to a reference origin.

46. The method of claim 45, wherein the device is a light-emitting device.

47. The method of claim 46, wherein the pattern comprises a plurality of holes formed in an interface.

48. The method of claim 46, wherein the interface is an emission surface of the light-emitting device.

49. The method of claim 46, wherein the transformed pattern is arranged such that light emitted from the light-emitting device has a substantially isotropic emission pattern.

50. The method of claim 46, wherein the transformed pattern is arranged such that light emitted from the light-emitting device has an anisotropic emission pattern.

51. The method of claim 45, wherein the periodic precursor pattern comprises a hexagonal pattern.

52. The method of claim 45, wherein the periodic precursor pattern comprises a plurality of features, and wherein the transformation of a periodic precursor pattern is applied to positions of the plurality of features of the periodic precursor pattern.

53. The method of claim 45, wherein the transformed pattern is non-periodic.

54. The method of claim 45, wherein the transformed pattern is periodic.