Enhancement of local electric field in core-shell orientation of ellipsoidal metal/dielectric nanoparticles
In this paper it is shown that the enhancement factor of the local electric field in metal covered ellipsoidal nanoparticles embedded in a dielectric host matrix has two maxima at two different frequencies. The second maximum for the metal covered inclusions with large dielectric core (small metal...
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| Date: | 2017 |
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| Main Authors: | , , |
| Format: | Article |
| Language: | English |
| Published: |
Інститут фізики конденсованих систем НАН України
2017
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| Series: | Condensed Matter Physics |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Enhancement of local electric field in core-shell orientation of ellipsoidal metal/dielectric nanoparticles / A.A. Ismail, A.V. Gholap, Y.A. Abbo // Condensed Matter Physics. — 2017. — Т. 20, № 2. — С. 23401: 1–11. — Бібліогр.: 16 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Summary: | In this paper it is shown that the enhancement factor of the local electric field in metal covered ellipsoidal
nanoparticles embedded in a dielectric host matrix has two maxima at two different frequencies. The second
maximum for the metal covered inclusions with large dielectric core (small metal fraction p) is comparatively
large. This maximum strongly depends on the depolarization factor of the core L⁽¹⁾z
, keeping that of the shell
L⁽²⁾z
constant and is less than L⁽¹⁾z
. If the frequency of the external radiation approaches the frequency of
surface plasmons of a metal, the local field in the particle considerably increases. The importance of maximum
value of enhancement factor |A|²
of the ellipsoidal inclusion is emphasized in the case where the dielectric core
exceeds metal fraction of the inclusion. The results of numerical computations for typical small silver particles
are presented graphically. |
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