https://doi.org/10.1140/epjp/s13360-023-04636-4
Regular Article
Optical and structural changes in intermediate phase Ge22Se78 thin film under 100 MeV Ag swift-heavy ion irradiation
1
Department of Physics, Dr RML College, CSJM University, 208017, Kanpur, India
2
Division of Physics, School of Basic Sciences, Galgotias University, 203201, Greater Noida, Uttar Pradesh, India
3
Department of Physics, DAV College, CSJM University, 208001, Kanpur, India
Received:
8
August
2023
Accepted:
27
October
2023
Published online:
4
November
2023
The current study examines the effects of six various fluences (3 × 1010, 1 × 1011, 3 × 1011, 1 × 1012, 3 × 1012, and 1 × 1013 ions/cm2) of 100 MeV Ag swift heavy ion irradiation on the optical characteristics of amorphous Ge22Se78 thin films. To analyse the structure and composition of materials, X-Ray Diffraction (XRD) and Energy-dispersive X-ray analysis (EDAX) measurements are utilised. The Swanepoel method, which is based on measurements of optical transmission, is used for linear optical analysis. When there are 1 × 1012 ions per cm2 of fluence, the optical bandgap widens.Semi-empirical relations are used to calculate nonlinear optical parameters (n2, χ (3), β and FOM) from linear optical parameters (Eg and n0). The single-oscillator Wemple-DiDomenico (WDD) model can be used to describe the dispersions of both pristine and irradiated films. The linear/ nonlinear refractive index, third order susceptibility, non linear optical absorption and figure of merit (FOM) reduces up to fluence 1 × 1012 ions/cm2. These parameters increase as fluence is increased more. Raman spectroscopy is used to understand how bonding rearrangement affects linear and nonlinear characteristics when heavy ions are irradiated quickly. In the context of photonic applications, the use of this study is discussed.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
