| US 7,499,480 B2 | ||
| Photonic crystal structure and surface-emitting laser using the same | ||
| Yasuhiro Nagatomo, Hachioji (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Nov. 08, 2007, as Appl. No. 11/936,837. | ||
| Claims priority of application No. 2006-310382 (JP), filed on Nov. 16, 2006; and application No. 2007-262271 (JP), filed on Oct. 05, 2007. | ||
| Prior Publication US 2008/0117941 A1, May 22, 2008 | ||
| Int. Cl. H01S 5/00 (2006.01); H01S 3/08 (2006.01); H01S 3/082 (2006.01) | ||
| U.S. Cl. 372—50.124 [372/92; 372/97; 372/98] | 11 Claims |
| 1. A structure comprising:
a photonic crystal layer including a first member having a first refractive index (n1) and having a surface with a plurality of holes arranged periodically;
a second member adjacent to the photonic crystal layer and having a second refractive index (n2) that is lower than the first refractive index (n1); and
third members having a third refractive index (n3) that is higher than 1.0, said third members being disposed in the holes,
wherein a relative refractive index difference ((n1−n2)/n1) between the first refractive index and the second refractive index is 0.10 or lower and gaps are formed between the first
member and the third members.
|