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Band Gap Modification of Diamond Photonic Crystals by Changing the Volume Fraction of the Dielectric Lattice
Author(s) -
Kanehira Shingo,
Kirihara Soshu,
Miyamoto Yoshinari,
Sakoda Kazuaki,
Takeda Mitsuo Wada
Publication year - 2003
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.1151-2916.2003.tb03541.x
Subject(s) - photonic crystal , materials science , stereolithography , diamond , dielectric , band gap , plane wave expansion method , diamond cubic , volume fraction , lattice (music) , plane wave expansion , condensed matter physics , ceramic , optoelectronics , photonics , optics , composite material , physics , acoustics
Photonic crystals with a diamond structure of epoxy lattices in which TiO 2 ‐based ceramic particles are dispersed were fabricated by stereolithography. The periodicity of the lattice was designed to reflect electromagnetic waves in the gigahertz range. The volume fraction (β) of the dielectric lattice medium was modified from 14% to 33% by changing the rod diameter of the lattice. The photonic band gap was observed along Γ‐L 〈111〉, Γ‐X 〈100〉, and Γ‐K 〈110〉 directions and the complete photonic band gap was formed at over β= 20%. The width of the forbidden gap increased gradually when the β increased over 14%, and reached 2.4 GHz at β= 33%. These results agreed with the band calculation using the plane wave expansion method.