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year 27, Issue 2 (ICOP & ICPET 2021 2021)
ICOP & ICPET _ INPC _ ICOFS 2021, 27(2): 692-695 |
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Madadi Z. Metal-Insulator-Metal based Plasmonic Perfect Absorber as a High-Sensitivity Sensor. ICOP & ICPET _ INPC _ ICOFS 2021; 27 (2) :692-695
URL: http://opsi.ir/article-1-2458-en.html
URL: http://opsi.ir/article-1-2458-en.html
Department of Electrical and Computer Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
Abstract: (833 Views)
In this paper, a nanoscale Metal-Insulator-Metal (MIM) structure with two different nano-aperture designs in the upper metal layer is proposed as a Perfect Absorber Sensor (PAS). The absorption spectrum of the structure is calculated using the 3D FDTD numerical method for the perpendicular incidence of a plane wave light within 1800-2300 nm wavelength range. In order to sense the refractive index of glucose solutions, these analytes are poured into the apertures of the structure. Simulation results show that a resonance peak is obtained in the absorption spectrum which is red-shifted with increasing the refractive index of the analyte. The sensitivity and detection limit were obtained 202.22 nm/RIU and 0.0131 for the first design, and 328.19 nm/RIU and 0.0126 for the second design, respectively. Hence, both structure designs are very suitable for different liquids sensing with refractive indices close to each other.
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