Low-loss and tunable near-zero-epsilon titanium nitride
Popovic M, Novakovic M, Schmidt E, Schoeppe P, Bibic N, Ronning C, Rakocevic Z (2017)
Publication Type: Journal article
Publication year: 2017
Journal
Book Volume: 72
Pages Range: 775-780
DOI: 10.1016/j.optmat.2017.07.035
Abstract
Titanium nitride (TiN) has emerged as alternative plasmonic material in the visible and near-infrared spectral range due to its metallic properties. We studied the influence of silver ion implantation (fluence range from 0.5 × 1016–6 × 1016 ions/cm2) on the structural and optical properties of reactively sputtered 260 nm thick TiN films. The columnar structure was partially destroyed by the irradiation and up to 5 at.% of Ag was incorporated into the films within the projected ion range. The formation of cubic Ag nanoparticles with size of 1–2 nm was observed by high resolution transmission electron microscopy and subsequent fast Fourier transform analysis. This presence of Ag within the TiN matrix drastically changes both the real and imaginary component of the dielectric function and provides low optical losses. A Drude Lorentz dielectric analysis based on free electron and oscillator model are carried out to describe the silver influence on the optical behavior of TiN. With increasing ion fluence, the unscreened plasma frequency decreased and broadening increased. The energy, strength and broadening of the interband transitions were studied with respect to the silver ion fluence and correlated with the microstructural changes induced in TiN films.
Involved external institutions
University of Belgrade / Универзитет у Београду
Serbia (RS)
Friedrich-Schiller-Universität Jena
Germany (DE)
Serbia (RS)
Friedrich-Schiller-Universität Jena
Germany (DE)
How to cite
APA:
Popovic, M., Novakovic, M., Schmidt, E., Schoeppe, P., Bibic, N., Ronning, C., & Rakocevic, Z. (2017). Low-loss and tunable near-zero-epsilon titanium nitride. Optical Materials, 72, 775-780. https://doi.org/10.1016/j.optmat.2017.07.035
MLA:
Popovic, Maja, et al. "Low-loss and tunable near-zero-epsilon titanium nitride." Optical Materials 72 (2017): 775-780.
BibTeX: Download