Optical Absorption of a Composite Based on Two-Layer Nanowires
| Authors | A.O. Koval1,2 |
| Affiliations |
1Zaporizhzhia Polytechnic National University, 64, Zhukovskogo St., 60063 Zaporizhzhia, Ukraine 2Scientific and Production Complex "Iskra", 84, Mahistralna St., 69071 Zaporizhzhia, Ukraine |
| Е-mail | andrej.koval@ukr.net |
| Issue | Volume 15, Year 2023, Number 1 |
| Dates | Received 05 December 2022; revised manuscript received 19 February 2023; published online 24 February 2023 |
| Citation | A.O. Koval, J. Nano- Electron. Phys. 15 No 1, 01014 (2023) |
| DOI | https://doi.org/10.21272/jnep.15(1).01014 |
| PACS Number(s) | 73.63. – b, 78.67. – n |
| Keywords | Metal oxide nanowire, Nanoshell, Composite (45) , Dielectric function, Frequency dependence, Absorption coefficient. |
| Annotation |
The optical properties of two-layer nanowires are analyzed within the classical Drude theory. The expressions and frequency dependences of the real and imaginary parts of the dielectric function for metal oxide nanowires and nanoshells are calculated. The optical absorption of a composite on the basis of both approaches is investigated. It is shown that the variation of the thickness of both the core and the shell leads to a change in the magnitude and position of the optical characteristics maxima of specified systems. The presence of two maxima of the absorption coefficient of the composite based on metal nanoshells is demonstrated. Splitting into two resonant peaks is due to the hybridization of surface plasmons, which depends on the inner and outer radii of the shell. The influence of the metal layer final thickness on the frequency dependences of the absorption coefficient is analyzed. Calculations are performed for metals Au, Ag and Al, which are in different dielectric matrices. It is established that the behavior of the optical absorption maxima of the composite is determined by the dielectric constant of the matrix. |
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List of References |
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