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year 27, Issue 1 (Iranian Nano-Photonic Conference 2020 2020)
ICOP & ICPET _ INPC _ ICOFS 2020, 27(1): 76-78 |
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Golzari Zamir S, Abdikian A. Plasmonic dispersion relation for a plasmonic medium with variable dielectric constant. ICOP & ICPET _ INPC _ ICOFS 2020; 27 (1) :76-78
URL: http://opsi.ir/article-1-2258-en.html
URL: http://opsi.ir/article-1-2258-en.html
1- Department of physics and photonics, Malayer university, Malayer, Iran.
Abstract: (1357 Views)
In this paper, the plasmonic dispersion relation in TM mode for the plane interface between a homogeneous dielectric medium with a constant εd and a plasmonic medium with a variable dielectric function εp(z) (in which ‘z’ is the normal coordinate to the interface) is obtained. It is revealed that the dispersion relation is related to the value of the derivative of εp(z) at the interface and when the εp becomes constant or its derivative at the interface is zero then the well-known dispersion relation for homogeneous plasmonic medium is obtained. For the case where εp(z) depends linearly on z, the dispersion relation is obtained and plotted. The results show that non-homogeneity of the plasmonic medium offers a good freedom to control dispersion relation and the plasmonic resonance frequency.
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