Magnetochirality in hierarchical magnetoplasmonic clusters. (September 2015)

• Record Type: Journal Article
• Authors: Yannopapas, Vassilios
• Is Part Of: Solid state communications. Volume 217(2015)
• Page Start: 47
• Page End: 52
• Publication Date: 2015-09
• Subjects: A. Magneto-topics -- B. Faraday effect -- C. Plasmonics -- D. Nanoparticles; Solid state chemistry -- Periodicals; Solid state physics -- Periodicals; Chimie de l'état solide -- Périodiques; Physique de l'état solide -- Périodiques; 530.41
• DOI: 10.1016/j.ssc.2015.05.016
• Languages: English
• ISSNs: 0038-1098

Abstract

Abstract: We show theoretically that finite hierarchical assemblies of clusters consisting magnetic (magnetite) and plasmonic (gold) nanoparticles show dramatically increased values of the magnetochiral dichroism compared to those measured in conventional materials exhibiting this phenomenon (liquid molecular systems, anisotropic crystals and chiral ferromagnets). These values are attributed to the strong interaction of the magnetite nanoparticles within the clusters as well as by the excitation of surface-plasmons in the gold nanoparticles. Along with the magnetochiral dichroism, in the studied hierarchical magnetoplasmonic designs, magneto-optical phenomena such as magnetic dichroism and Faraday rotation are also enhanced relative to the case of purely magnetic nanostructures. Abstract : Highlights: A novel metamaterial design which enhance by several orders of magnitude the magnetochiral dichroism which is difficult to probe experimentally in conventional materials (liquid molecular systems, anisotropic crystals and chiral ferromagnets), a phenomenon. The enhancement of the magnetochiral dichroism is attributed to the strong interaction of the magnetite nanoparticles within the clusters as well as by the excitation of surface-plasmons in the gold nanoparticles. Along with the magnetochiral dichroism, in the studied hierarchical magnetoplasmonic designs, magneto-optical phenomena such as magnetic dichroism and Faraday rotation are also greatly enhanced relative to the case of purely magnetic nanostructures. The current manuscript is an interdisciplinary contribution from various areas such as optical properties of nanostructures, magnetoplasmonics, metamaterials, physical chemistry, and theoretical condensed matter physics.