Abstract
Within the framework of the generalized Mie theory for concentric spheres we have performed calculations of light absorption cross sections for three-layer spherical nanoparticles consisting of a gold core, an intermediate passive layer, and an outer shell of molecular J-aggregates. A significant change in the behavior and characteristic features in the studied spectra in the visible range has been demonstrated with varying the geometrical parameters of the nanospheres, the transition oscillator strength in the J-aggregate shell of the particle, and the detuning of the Frenkel exciton frequency relative to the position of the maximum of the dipole plasmon resonance peak in its gold core. The results indicate a significant change in the magnitude and nature of the plasmon-exciton coupling in a metalorganic system with varying sizes and optical constants of its constituent components.
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ACKNOWLEDGMENTS
The authors are grateful to A.D. Kondorskiy for the valuable discussions.
Funding
The work was supported by the Russian Science Foundation (project no. 19-79-30086).
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Moritaka, S.S., Lebedev, V.S. Effect of Geometrical Parameters and Optical Constants of Three-Layer Metalorganic Nanospheres on the Behavior of Their Absorption Spectra. Bull. Lebedev Phys. Inst. 50, 589–594 (2023). https://doi.org/10.3103/S1068335623120102
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DOI: https://doi.org/10.3103/S1068335623120102