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Influence of time dependent laser-irradiation for tuning the linear-nonlinear optical response of quaternary Ag10In15S15Se60 films for optoelectronic applications

Parida, A and Alagarasan, D and Ganesan, R and Bisoyi, S and Naik, R (2023) Influence of time dependent laser-irradiation for tuning the linear-nonlinear optical response of quaternary Ag10In15S15Se60 films for optoelectronic applications. In: RSC Advances, 13 (7). pp. 4236-4248.

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Official URL: https://doi.org/10.1039/d2ra07981j


The impact of laser irradiation on thin films results in multiple beneficial modifications of their structural, morphological, nonlinear-linear properties for optoelectronics applications. This work deals with the thermally evaporated Ag10In15S15Se60 films and post-laser irradiation to study the variations in structural and optical properties. The current investigation was carried out for different laser irradiation time durations such as 0, 10, 20, 30, and 60 minutes by 532 nm laser (2.34 eV). According to the X-ray diffraction analysis, all thin films have polycrystalline character. The change in the surface morphology after being exposed to the laser has been checked by FESEM, whereas the presence of constitutional elements has been verified by the EDX study. The related changes with laser irradiation in the optical properties, including both linear and nonlinear, were studied using UV-Vis spectroscopy data. The irradiation caused an enhancement in the transmission, and the absorption edge moved towards a lower wavelength, increasing the bandgap energy from 1.71 eV to 1.88 eV. The refractive index reduced as a result of the film's altered structure. The behaviour of the refractive index satisfies Moss's rule (Egn4 = const). The nonlinear refractive index, first-order and 3rd order nonlinear susceptibility, is found to be decreased with laser irradiation. The dielectric parameters are also observed to be decreased with irradiation. Considering all the alterations in its properties caused by irradiation, the Ag10In15S15Se60 sample could be a favourable material for various photonic devices. © 2023 The Royal Society of Chemistry.

Item Type: Journal Article
Publication: RSC Advances
Publisher: Royal Society of Chemistry
Additional Information: The copyright for this article belongs to the Authors.
Keywords: Indium compounds; Morphology; Nonlinear optics; Photonic devices; Refractive index; Selenium compounds; Silver compounds; Sulfur compounds; Surface morphology; Thin films; Ultraviolet visible spectroscopy; X ray powder diffraction, 'current; 532 nm laser; Irradiation time; Linear properties; Nonlinear optical response; Optoelectronic applications; Structural and optical properties; Thin-films; Time dependent; Time duration, Irradiation
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 21 Feb 2023 03:30
Last Modified: 21 Feb 2023 03:30
URI: https://eprints.iisc.ac.in/id/eprint/80547

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