Premium
Fabrication of Photonic Crystal with a Diamond Structure Having an Air Cavity Defect and its Microwave Properties
Author(s) -
Kanehira Shingo,
Kirihara Soshu,
Miyamoto Yoshinari,
Sakoda Kazuaki,
Takeda Mitsuo Wada
Publication year - 2005
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00478.x
Subject(s) - materials science , photonic crystal , diamond , microwave , fabrication , optics , diamond cubic , electric field , optoelectronics , composite material , physics , medicine , alternative medicine , pathology , quantum mechanics
Three‐dimensional photonic crystals with a diamond lattice structure consisting of 5 × 5 × 5 unit cells with the unit cell dimension of 15 mm were fabricated using TiO 2 ‐based ceramic particles dispersed epoxy by stereolithography. The diamond lattice showed a perfect band gap between 14.3 and 15.8 GHz. An air cavity defect with a rectangular shape (15 mm × 45 mm × 15 mm) was introduced at the center of the crystal by extracting 3 unit cells in order to investigate the shape effect of the defect on the formation of localized defect modes of electromagnetic wave. When microwaves were radiated normal to the wide sides (45 mm × 15 mm) of the rectangular shape defect, a sharp localized mode appeared at the middle of the band gap. However, no localized mode was observed for incident waves normal to the smaller side (15 mm × 15 mm) because of the symmetry mismatching between internal eigenmodes in the defect cavity and incident plane waves. The mode analysis using a simple cavity model showed the penetration of the electric field of resonant modes about 2.4 mm into the host lattice.