研究目的
Theoretical investigation of the Faraday effect and magnetic circular dichroism (MCD) in composite media containing spherical ferromagnetic nanoparticles with plasmon shells or clusters consisting of two homogeneous spherical particles, one ferromagnetic and the other plasmon.
研究成果
The presence of a plasmon component in a layered particle or a two-particle cluster leads to an increase in the magneto-optical response in the wavelength range corresponding to the plasmon resonance of a noble metal. For layered particles, this response is comparable to the response in the plasmon resonance range of the ferromagnetic component. The findings suggest that by choosing the parameters and composition of the magneto-plasmon system, it is possible to enhance magneto-optical effects in the desired spectral region.
研究不足
The study is theoretical, and the practical application of the findings may be limited by the assumptions made in the quasistatic approximation and the Maxwell–Garnett model. The effect of higher multipolarity plasmon vibrations in two-particle clusters is not fully accounted for.
1：Experimental Design and Method Selection:
The study employs the quasistatic approximation of electrodynamics to calculate optical absorption spectra, MCD spectra, the orientation angle of the polarization ellipse, and the ellipticity of the light wave for the systems under consideration. The Maxwell–Garnett model is used to determine the effective dielectric constant of the media.
2：Sample Selection and Data Sources:
The systems considered include spherical particles with a ferromagnetic core and plasmon shell or two-particle clusters consisting of ferromagnetic and plasmon nanoparticles.
3：List of Experimental Equipment and Materials:
Not explicitly mentioned in the paper.
4：Experimental Procedures and Operational Workflow:
The study is theoretical, focusing on calculations based on the dipole dynamic polarizability of a layered nanoparticle or a two-particle cluster.
5：Data Analysis Methods:
The analysis involves calculating the effective dielectric constant tensor of the medium with inclusions and determining the magneto-optical response based on the structure of the dipole dynamic polarizability tensor of the inclusion.
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