Excitation of surface waves in a photonic crystal with negative refraction: The role of surface termination

R. Moussa, Th. Koschny, C. M. Soukoulis
2006 Physical Review B  
Results of the excitation of surface waves in a photonic crystal ͑PC͒ with negative refraction slab are presented. The role of the surface termination of the finite PC in exciting surface waves and enhancing the transmission is examined. It is demonstrated that only for a specific surface termination, the surface waves in the PC are excited in the same fashion as in a homogeneous medium. The existence of peaks well above the propagating modes in the calculated transfer function confirms the
more » ... on confirms the excitation of the surface modes and explains the high intensity of the field at the image plane as well as in both interfaces. The dependence of the excitation of the surface waves on the system length is analyzed. Finally, the unexpected high sensitivity of the focus position to the surface termination is evaluated.
doi:10.1103/physrevb.74.115111 fatcat:tzcf6ikf6begxicscapojhrphq