Abstract
Plasmon like excitation is observed at the interface between one-dimensional periodic array of air holes in silicon (Si) with ferroelectric polyvinylidene fluoride (PVDF) as a substrate to obtain subwavelength confinement of surface Plasmon modes at terahertz (THz) frequencies. A truly Plasmonic TM mode is obtained confined at the interface of PVDF layer and the 1D perforated dielectric slab and the mode field distribution of the structure is demonstrated using three dimensional (3D) Finite Difference Time domain Method (FDTD) method. It is shown that PVDF are promising materials for strongly confined THz wave propagation in Surface Plasmon photonic crystal. The transmission, confinement and hence the propagation length of the plasmonpolariton like terahertz surface modes sustained by the structure are studied using Finite difference time domain (FDTD) method. Further, the propagation characteristics of surface Plasmon polariton (SPP) which can be controlled by the structure geometry is discussed.
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