2011•Journal of Taiyuan University of TechnologyRequires access

Photonic Bandgap in Two-dimensional Photonic Crystals of Germanium Columns

Guo Pu-qinga

Abstract

Plane wave expansion method was adopted to calculate the bandgap of 2-D photonic crystals with triangular lattice,kagome lattice and graphite lattice.The structural parameters of photonic crystals with the largest complete bandgap were obtained by optimization calculation.Complete bandgap for graphite lattice appeaed when filling ratio changed in a wide range,and the maximum width of complete bandgap was Δ=0.053 in the low-energy region.

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Key concepts: Photonic crystal, Band gap, Materials science, Plane wave expansion method, Plane wave expansion, Germanium, Lattice (music), Photonics