The relative band gap for a rhombus lattice photonic crystal is studied by plane wave expansion method and high frequency structure simulator (HFSS) simulation. General wave vectors in the first Briliouin zone are derived. The relative band gap as a function of air-filling factor and background material is investigated, respectively, and the nature of photonic band gap for different lattice angles is analyzed by the distribution of electric energy. These results would provide theoretical instruction for designing optical integrated devices using photonic crystal with a rhombus lattice.
© 2008 Chinese Optics Letters
(160.4670) Materials : Optical materials
(220.0220) Optical design and fabrication : Optical design and fabrication
(230.0230) Optical devices : Optical devices
(230.3120) Optical devices : Integrated optics devices
Limei Qi, Ziqiang Yang, Xi Gao, and Zheng Liang, "Analysis of two-dimensional photonic band gap structure with a rhombus lattice," Chin. Opt. Lett. 6, 279-281 (2008)