Read me file: University of Southampton – ECS – Moïse Sotto – mshs1m15@soton.ac.uk The excel file contains simulation data for the paper "Transversal Symmetry Breaking in Novel Photonic Crystal Waveguide: Innovative Manner to Master Defect Band Dispersion Relation". In particular: Fig. 3. Normalized relation dispersion of the squeezed W1 line defect in function of the mismatch calculated by FDTD method. Date of data collection: from April to May 2017 Information about geographic location of data collection: University of Southampton, U.K. Date that the file was created: May 2017