https://doi.org/10.1140/epjs/s11734-025-01655-3
Regular Article
Fractal, linear, and non-linear optical properties of Mn-based complex star-shaped nanostructure
1
Department of Physics, May.C., Islamic Azad University, Maybod, Iran
2
Department of Physics, CT.C., Islamic Azad University, Tehran, Iran
Received:
14
February
2025
Accepted:
24
April
2025
Published online:
27
May
2025
The Mn-based complex star-shaped nanostructure was deposited simultaneously with the rotation of the substrate at certain angles by glancing angle deposition (GLAD). X-Ray diffraction (XRD) analysis revealed the presence of multiple phases of Mn oxide. The morphological features of the structure were analyzed using field emission scanning electron microscopy (FESEM). Atomic force microscopy (AFM) was employed to investigate the monofractal and multifractal properties of the nanostructure surface. The optical constants n and k were derived from reflection spectra of s- and p-polarized incident light using the Kramers–Kronig method. Additionally, the non-linear optical properties were evaluated using the z-scan technique, yielding a second-order non-linear refractive index (n2 = 1.7 × 10–10 cm W−1) and a non-linear absorption coefficient (β = 1.84 × 10–4 cm W−1) for the MnO nanostructure. Furthermore, discrete dipole approximation (DDA) was employed to simulate the angular scattering and absorption cross sections, providing insights into the light–matter interactions of the nanostructure. The results emphasize the critical role of the nanostructure geometry in enhancing the non-linear optical properties.
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© The Author(s), under exclusive licence to EDP Sciences, Springer-Verlag GmbH Germany, part of Springer Nature 2025
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.
