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year 27, Issue 2 (ICOP & ICPET 2021 2021)
ICOP & ICPET _ INPC _ ICOFS 2021, 27(2): 275-278 |
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Panahi T, Nozhat N. GST-based Plasmonic Nano-switch with Equivalent Circuit Model in Near-infrared Region. ICOP & ICPET _ INPC _ ICOFS 2021; 27 (2) :275-278
URL: http://opsi.ir/article-1-2358-en.html
URL: http://opsi.ir/article-1-2358-en.html
1- Department of Electrical Engineering, Shiraz University of Technology
Abstract: (857 Views)
In this paper, a plasmonic nano-switch that is composed of a silver nanodisk located on the GST layer is designed and simulated in the near-infrared region. The GST phase change material adjusts the structure by changing the temperature. Due to the significant change in the GST bond, when it varies from amorphous state to crystalline one, its refractive index increases remarkably. A change in the absorption spectrum between amorphous and crystalline states leads to switching capability with the extinction ratio of 10.3 dB at the wavelength of 1564 nm. In order to optimize the structure performance, the effects of GST thickness, nanodisk radius size and incident angle are investigated. Also, the equivalent circuit method is derived to confirm the simulation results. The obtained results demonstrate the high capability of using phase change materials specially GST, as a suitable material for use in various energy-efficient switchable photonic devices such as absorbers, multi-level memories and color devices at optical frequencies.
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