Optimizing Strontium Ruthenate Thin Films for Near-Infrared Plasmonic Applications

Laurentiu Braic, Nikolaos Vasilantonakis, Bin Zou, Stefan A. Maier, Neil Mc N. Alford, Anatoly V. Zayats, Peter K. Petrov

Research output: Contribution to journalArticleResearchpeer-review

18 Citations (Scopus)

Abstract

Several new plasmonic materials have recently been introduced in order to achieve better temperature stability than conventional plasmonic metals and control field localization with a choice of plasma frequencies in a wide spectral range. Here, epitaxial SrRuO 3 thin films with low surface roughness fabricated by pulsed laser deposition are studied. The influence of the oxygen deposition pressure (20-300 mTorr) on the charge carrier dynamics and optical constants of the thin films in the near-infrared spectral range is elucidated. It is demonstrated that SrRuO 3 thin films exhibit plasmonic behavior of the thin films in the near-infrared spectral range with the plasma frequency in 3.16-3.86â€...eV range and epsilon-near-zero wavelength in 1.11-1.47â€...μm range that could be controlled by the deposition conditions. The possible applications of these films range from the heat-generating nanostructures in the near-infrared spectral range, to metamaterial-based ideal absorbers and epsilon-near-zero components, where the interplay between real and imaginary parts of the permittivity in a given spectral range is needed for optimizing the spectral performance.

Original languageEnglish
Article number9118
Number of pages5
JournalScientific Reports
Volume5
DOIs
Publication statusPublished - 13 Mar 2015
Externally publishedYes

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