Open AccessArtificial immune system optimisation of complete bandgap of bidimensional anisotropic photonic crystals
Author(s) -
Dourado Sisnando Anderson,
Vieira Luana,
Rodriguez Esquerre Vitaly Felix,
Simões Silva Fabrício G.
Publication year - 2015
Publication title -
iet optoelectronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.379
H-Index - 42
eISSN - 1751-8776
pISSN - 1751-8768
DOI - 10.1049/iet-opt.2014.0131
Subject(s) - photonic crystal , photonic bandgap , photonics , anisotropy , materials science , optoelectronics , band gap , immune system , nanotechnology , optics , physics , biology , immunology
The artificial immune system (AIS) and the finite element method (FEM) have been used to solve the inverse problem involving the search and the optimisation of the complete photonic bandgap (PBG) of photonic crystal structures with two dimensions periodicity. Triangular lattices composed of silicon (isotropic material) and air and square and triangular lattices composed of tellurium (anisotropic material) and air, have been considered for the validation and analysis of this study, respectively. The PBGs were calculated along the edges of the first Brillouin zone to reduce the high computational effort for this kind of problem. Absolute midgap ratio PBGs of 17.14 and 24.41% have been obtained, for the square and triangular lattices, between the transversal electric TE 12 and the transversal magnetic TM 34 modes with anisotropic materials, respectively, and 18% for the triangular lattice, between the TE 12 and the TM 23 modes with isotropic materials.