OPTICAL ABSORPTION OF A COMPOSITE BASED ON BILAYER METAL-DIELECTRIC SPHERICAL NANOPARTICLES
Abstract
We investigated the optical properties of nanoparticles of the core-metal shell type and the composites based on them in the classical approximation. The frequency dependences of the real and imaginary parts of the dielectric permeability of bilayer particles, as well as the absorption coefficient of the composites based on them, are calculated. We established the existence of small-scale oscillations of the real and imaginary parts of the dielectric permeability and absorption coefficient in the low-frequency region of the spectrum. The behavior of the dielectric function of bilayer nanoparticles for the limiting cases of thin and thick shells is analyzed. The influence of the effective mean free path of electrons on the optical characteristics of bilayer nanoparticles is considered. The presence of two maxima of the absorption coefficient of the composite due to the hybridization of polar modes is demonstrated.
About the Authors
A. V. Korotun
National University “Zaporizhzhia Politechnic”
Ukraine
69063, Zaporizhzhia
Ukraine
69063, Zaporizhzhia
A. A. Koval’
National University “Zaporizhzhia Politechnic”
Ukraine
69063, Zaporizhzhia
Ukraine
69063, Zaporizhzhia
I. N. Titov
UAD Systems
Ukraine
69002, Zaporizhzhia
Ukraine
69002, Zaporizhzhia
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Review
For citations:
Korotun A.V., Koval’ A.A., Titov I.N. OPTICAL ABSORPTION OF A COMPOSITE BASED ON BILAYER METAL-DIELECTRIC SPHERICAL NANOPARTICLES. Zhurnal Prikladnoii Spektroskopii. 2020;87(2):224-232. (In Russ.)
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