Volume 119, Number 6, September 2017
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||30 November 2017|
The role of ion irradiation in activating silent Raman modes via tuning in plasmonic behaviour and surface disorder of Au/ZnO/Pt NFG system
1 Department of Physics, Indian Institute of Technology Delhi - Hauz Khas, New Delhi - 110016, India
2 Inter University Accelerator Centre - Aruna Asaf Ali Marg, New Delhi - 110067, India
Received: 2 August 2017
Accepted: 31 October 2017
The perceptible progression of Raman modes of zinc oxide (ZnO) is studied in nanostructures film gap (Au (10 nm)/ZnO (70 nm)/Pt (50 nm)) system with 1.2 MeV Xe ion irradiation. Unattainable silent Raman modes of ZnO turn out to be strongly visible after ion irradiation. The creation of ion-beam–induced lattice disorder, defects, and impurities in a ZnO layer leads to breakdown the translational crystal symmetry that results in the origin of silent modes. The formation of hot-spots in the ZnO layer of the NFG system also supports the enhancement of the intensity of Raman modes. Overall results are attributed to combined effects of lattice disorder, defects, and impurities along with plasmonic effect and explained in the framework of elastic-thermal-spike formation.
PACS: 61.80.Jh – Ion radiation effects / 68.35.Ja – Surface and interface dynamics and vibrations
© EPLA, 2017
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