Journal
OPTICAL MATERIALS EXPRESS
Volume 5, Issue 12, Pages 2786-2797Publisher
OPTICAL SOC AMER
DOI: 10.1364/OME.5.002786
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Funding
- National Science Foundation (NSF) under NSF [ECS-0335765]
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Alternative materials for plasmonic devices have garnered much recent interest. A promising candidate material is titanium nitride. Although there is a substantial body of work on the formation of this material, its use for plasmonic applications requires a more systematic and detailed optical analysis than has previously been carried out. This paper describes an initial optimization of sputtered TiN thin films for plasmonic performance from visible into near-IR wavelengths. The metallic behavior of TiN films exhibits a sensitive dependence on the substrate and deposition details. We explored reactive and non-reactive sputter deposition of TiN onto various substrates at both room temperature and 600 degrees C. Metallic character was compared for films grown under different conditions via spectroscopic ellipsometry and correlated with compositional and structural measurements via x-ray photoelectron spectroscopy (XPS), x-ray diffraction (XRD), and scanning transmission electron microscopy (STEM). (C) 2015 Optical Society of America
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