Efficient directional forward scattering by a single Cu@Si core-shell nanoparticle in visible regions

• Published in: Optical materials Vol. 148; p. 114895
• Main Authors: Batelbek, Hmbat, Abadula, Rukeyemuhan, Li, Pengwei, Du, Peihui, Ren, Peiwen, Gao, Min
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.2024
• Subjects: Core-shell nanoparticle; Directional scattering; High-refractive-index nanostructures; Surface plasmons; Directional scattering; High-refractive-index nanostructures; Surface plasmons; Core-shell nanoparticle
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2024.114895

Efficient control of optical radiation at nanoscale dimensions have attracted considerable interests in nano antennas, sensors, and light-emitting devices. Herein, based on Mie theory and the Kerker condition, we have theoretically achieved directional forward scatterings realized through a single Cu@Si core-shell nanoparticle in visible regions. Importantly, the contributions of high-order electric and magnetic quadrupoles on directional scatterings beyond conventional dipolar modes have been demonstrated through multipole analysis of electromagnetic scattering. Moreover, by optimizing the structural parameters, such as the size of the core radius and the thickness of the shell, the directivity can be engineered readily. These findings provide guidance for designing structures capable of achieving signal enhancement, manipulation, and directional transmission. •Based on Mie theory and Kerker effect, directional forward scatterings of Cu@Si core-shell nanoparticle are achieved in visible ranges.•By adjusting the size of the core radius and the thickness of the shell, the forward scattering has been tuned readily.•Our findings benefit the design of structures for signal enhancement and directional transmission.