Plasmonic properties of refractory titanium nitride

Abstract

The development of plasmonic and metamaterial devices requires the research of high-performance materials, alternative to standard noble metals. Renewed as refractory stable compound for durable coatings, titanium nitride has been recently proposed as an efficient plasmonic material. Here, by using a first principles approach, we investigate the plasmon dispersion relations of TiN bulk and we predict the effect of pressure on its optoelectronic properties. Our results explain the main features of TiN in the visible range and prove a universal scaling law which relates its mechanical and plasmonic properties as a function of pressure. Finally, we address the formation and stability of surface-plasmon polaritons at different TiN/dielectric interfaces proposed by recent experiments. The unusual combination of plasmonics and refractory features paves the way for the realization of plasmonic devices able to work at conditions not sustainable by usual noble metals.

11 pages, 7 figures

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• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Quantum Plasmonics
• Theory of surface plasmons and surface-plasmon polaritons
• turboEELS -- A code for the simulation of the electron energy loss and inelastic X-ray scattering spectra using the Liouville-Lanczos approach to time-dependent density-functional perturbation theory
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Cited by in corpus (6)

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• Plasmon thermal conductivity of thin Au and Ag films
• Imaging Nanoscale Carrier, Thermal, and Structural Dynamics with Time-Resolved and Ultrafast Electron Energy-Loss Spectroscopy