Dielectric PEG materials have received broad attention due to their distinguished performance in high-density integrated optics and multi-functional devices like ultra-compact switches, optical intensity modulator, novel sensor topologies, microwave generation and laser acceleration. We have theoretically worked photonic band structure parameters of different geometries. The photonic band structure computations are applied utilizing the MIT photonic-bands package (MPB). Eigenmodes are calculated in Fourier domain. Model calculations are based on two-dimensional periodic crystal structure. The lattices consist of square rods and gaps between the rods filled with air. Moreover, we have evaluated the nature of guide modes in W1 defect waveguide. For this purpose, we used the MIT Electromagnetic Equations Propagation (MEEP) software package for numerical calculations. Our results will make a positive contribute to the literature. The results of the present study will make a positive contribution to the literature and can be used for the design of efficient optical devices. (C) 2015 Elsevier GmbH. All rights reserved.