Titanium nitride as a plasmonic material for excitation of Tamm plasmon states in visible and near-infrared region

Abstract

In this study, I demonstrated the existence of Tamm plasmon polariton (TPP) modes at the interface of one-dimensional photonic crystals (1D PhC) and metal nitrides. Metal nitrides such as titanium nitride (TiN), zirconium nitride (ZrN), tantalum nitride (TaN), and hafnium nitride (HfN) exhibit metallic properties in the visible and infrared spectral ranges. Theoretical calculations were performed to evaluate TiN as an alternative plasmonic material to conventional plasmonic metals for the excitation of TPP modes in the visible and near-infrared spectral region. The transfer matrix method was used to study the proposed structure and its spectral properties. I also explored the suitable conditions for the efficient excitation of TPP modes with TiN as a plasmonic material. The optimum TiN thickness was investigated for TPP excitation in the visible and near-infrared spectral region. In addition, I explored the angular dispersion characteristics of the TPP modes in TiN-PhC configurations. The results obtained in this study may be useful for designing devices based on TPPs.