title: Gallium nitride based logpile photonic crystals.
abstract: We demonstrate a nine-layer logpile three-dimensional photonic crystal (3DPC) composed of single crystalline gallium nitride (GaN) nanorods, ∼100 nm in size with lattice constants of 260, 280, and 300 nm with photonic band gap in the visible region. This unique GaN structure is created through a combined approach of a layer-by-layer template fabrication technique and selective metal organic chemical vapor deposition (MOCVD). These GaN 3DPC exhibit a stacking direction band gap characterized by strong optical reflectance between 380 and 500 nm. By introducing a "line-defect" cavity in the fifth (middle) layer of the 3DPC, a localized transmission mode with a quality factor of 25-30 is also observed within the photonic band gap. The realization of a group III nitride 3DPC with uniform features and a band gap at wavelengths in the visible region is an important step toward realizing complete control of the electromagnetic environment for group III nitride based optoelectronic devices.
authors.affiliation: Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185, United States. gssubra@sandia.gov
authors.forename: Ganapathi
authors.initials: G
authors.lastname: Subramania
authors.forename: Qiming
authors.initials: Q
authors.lastname: Li
authors.forename: Yun-Ju
authors.initials: YJ
authors.lastname: Lee
authors.forename: Jeffrey J
authors.initials: JJ
authors.lastname: Figiel
authors.forename: George T
authors.initials: GT
authors.lastname: Wang
authors.forename: Arthur J
authors.initials: AJ
authors.lastname: Fischer
mesh_terms: D003460:Crystallization / Q000379:methods*; D005708:Gallium / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D017785:Photons; D012031:Refractometry; D013499:Surface Properties
chemical_list: D046911:Macromolecular Substances; C473348:gallium nitride; D005708:Gallium