Wolkite University | Ethiopia
Shewa Getachew is a physicist at Wolkite University with an MSc in Physics and an emerging research profile in plasmonics, nonlinear optics, and nanocomposite photonics. With an h-index of 2, eight indexed documents, and ten citations from four sources, his work focuses on the optical properties of core–shell nanostructures, including refractive index engineering, group velocity modulation, optical bistability, and local field enhancement in metal–dielectric composites. His publications span reputable journals such as Physica E, Brazilian Journal of Physics, Applied Physics B, Optical Review, Canadian Journal of Physics, and The European Physical Journal D. His research explores size-, geometry-, and dielectric-dependent plasmonic responses in nanomaterials, contributing to slow- and fast-light applications, nonlinear optical switching, and photonic device optimization. He has also conducted interdisciplinary studies in phytochemistry and higher education pedagogy. As a physics lecturer, he integrates theoretical modeling with computational simulation to advance understanding of nano-optical phenomena. His contributions were recognized with the World Research Awards (WRA) Best Innovation Award (Physics and Astronomy) in 2024. Overall, his work continues to support the development of advanced photonic materials with tunable optical responses for next-generation nanotechnology applications.
Featured Publications
Getachew, S. (2026). Size and dielectric-dependent plasmonic resonances in CdS@Ag core–shell quantum dots: Field enhancement, dispersion, and slow-light effects. Physica E: Low-Dimensional Systems and Nanostructures. https://doi.org/10.1016/j.physe.2025.116371
Getachew, S. (2025). Size-dependent dispersion and slow-light effects in CdS@Ag core-shell quantum dots: A theoretical study of plasmonic resonances and group velocity modulation. Brazilian Journal of Physics. https://doi.org/10.1007/s13538-025-01906-7
Getachew, S. (2025). Geometric and dielectric engineering of linear optical response in CdS@Ag core–shell quantum dots: A theoretical study of plasmonic enhancement and host effects. Applied Physics B. https://doi.org/10.1007/s00340-025-08578-w
Getachew, S. (2025). Geometric shape’s impact on core-shell nanocomposites’ optical properties. Journal of Computational Electronics. https://doi.org/10.1007/s10825-025-02388-1