Abstract
Abstract Nested square 2D lattice of gold nanospheres encased in a film of bismuth-substituted yttrium iron garnet (Bi:YIG) have been studied. Symmetry, structural and dielectric parameters of such nanostructures have been found to define the number of plasmon resonances and their spectral positions. As compared with a conventional film of Bi:YIG, the magneto-optical response of the studied nanostructures considerably increases due to the plasmon resonances, and the sign of polarization rotation is defined by a configuration of the localized near fields. Also, we demonstrate that, due to the nested arrangement, the optical and magneto-optical responses of the nanostructures can be strongly altered with a negligible change in their structural parameters.
Highlights
To demonstrate a new view on plasmonic MO nanostructures, we introduce a nested square two-dimensional (2D) lattice of gold (Au) nanospheres encased in a magnetic host
We will show that the number and spectral positions of the localized surface plasmon resonances (LSPR) bands in spectra of the nested Au-Bi:YIG nanostructure are governed by the radius of nanospheres, the MO response can be enhanced at frequencies of LSPRs and it becomes extremely sensitive to the radius of the nanospheres
Two main features are in spectra of such strustures: LSPR (D) band is defined by the lattice period D and has a large spectral shift as D changes and LSPR on single spherical nanoparticle in the short-wavelength (SW) band at approximately 600 nm (see Fig. 1(a))
Summary
To demonstrate a new view on plasmonic MO nanostructures, we introduce a nested square two-dimensional (2D) lattice of gold (Au) nanospheres encased in a magnetic host (a layer bismuth-substituted yttrium iron garnet, Bi:YIG). We analyze spectra of 2D AuBi:YIG nanostructures with square lattices having different periods and discuss LSPRs on single nanospheres and their ensemble. We select a 2D lattice and insert additional nanospheres with radius R, composing another square lattice, into it, forming a nested 2D lattice.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
