Theoretical investigation of optical properties of optimal architectures of magnetoplasmonic nanoparticles in human tissue for potential applications in photothermal therapy

The absorption and scattering efficiencies of light by a single magnetoplasmonic nanoparticle, based on magnetite gold, embedded in human tissue are analyzed theoretically the framework Finite-Difference-Time-Domain method Lorenz-Mie theory. We consider separately three different architectures for nanoparticle: rectangular three-layer gold/magnetite/gold nanobar, circular nanoring magnetite/gold core/shell nanosphere. address influence particle sizes magnetite-layer gold-layer thicknesses optical response such nanostructures. Particular attention is paid to effectiveness these designed nanostructures photothermal therapy. Our simulation shows that hybrid support famous localized surface plasmon resonance mode which manifests itself spectrum an intense peak whose spectral position can be adjusted first second NIR-biological windows. magnitude resonant as well corresponding vary from one nanostructure another and, same nanostructure, change with its characteristic sizes. nanobars nanorings significant accompanied into both For nanospheres, low efficiency within window, together their large sizes, limit usefulness therapy operating window only.