Surface plasmon resonance in nanostructured Ag incorporated ZnS films

Silver incorporated zinc sulfide thin films are prepared by RF magnetron sputtering technique and the influence of silver incorporation on the structural, optical and luminescence properties is analyzed using techniques like grazing incidence X-Ray diffraction (GIXRD), atomic force microscopy (AFM),...

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Bibliographic Details
Published in:AIP advances 2015-10, Vol.5 (10), p.107207-107207-17
Main Authors: Chalana, S. R., Ganesan, V., Mahadevan Pillai, V. P.
Format: Article
Language:English
Subjects:
ABSORPTION
Absorption spectra
ATOMIC FORCE MICROSCOPY
Blue shift
Crystal structure
Crystallinity
Energy dispersive X ray spectroscopy
Energy dissipation
Energy gap
ENERGY TRANSFER
FIELD EMISSION
Field emission microscopy
Incorporation
Luminescence
Magnetron sputtering
MATERIALS SCIENCE
Microscopy
Morphology
NANOSTRUCTURES
Optical properties
PERMITTIVITY
PHOTOLUMINESCENCE
Quantum confinement
RAMAN SPECTROSCOPY
REDUCTION
SCANNING ELECTRON MICROSCOPY
SILVER
Spectrum analysis
SPUTTERING
STRAINS
Surface chemistry
SURFACE ENERGY
Surface plasmon resonance
SURFACES
THIN FILMS
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY
Zinc sulfide
ZINC SULFIDES
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Description
Summary:Silver incorporated zinc sulfide thin films are prepared by RF magnetron sputtering technique and the influence of silver incorporation on the structural, optical and luminescence properties is analyzed using techniques like grazing incidence X-Ray diffraction (GIXRD), atomic force microscopy (AFM), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), micro-Raman spectroscopy, UV-Vis spectroscopy and laser photoluminescence spectroscopy. XRD analysis presents hexagonal wurtzite structure for the films. A reduction of crystallinity of the films is observed due to Ag incorporation. The Raman spectral analysis confirms the reduction of crystallinity and increase of strain due to the Ag incorporation. AFM analysis reveals a rough surface morphology for the undoped film and Ag incorporation makes the films uniform, dense and smooth. A blue shift of band gap energy with increase in Ag incorporation is observed due to quantum confinement effect. An absorption band (450-650 nm region) due to surface plasmon resonance of the Ag clusters present in the ZnS matrix is observed for the samples with higher Ag incorporation. The complex dielectric constant, loss factor and distribution of volume and surface energy loss of the ZnS thin films are calculated. Laser photoluminescence measurements gives an intense bluish green emission from the ZnS films and a quenching of the PL emission is observed which can be due to the metal plasmonic absorption and non-radiative energy transfer due to Ag incorporation.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.4933075