1- Optoelectronic Laboratory,Faculty Of Electrical Engineering, Shahid Bahonar University of kerman
Abstract: (1559 Views)
In this paper, a narrowband plasmonic absorber based on a metal-dielectric-metal-dielectric-metal periodic structure is proposed and numerically investigated, which consists of aluminium nanobar periodic array on a thin aluminium film separated by a dielectric layer. The absorber works at near-infrared region and can be operated as a refractive index sensor with a high sensitivity of around 2300 nm/RIU, a narrow absorption bandwidth (FWHM) of 20nm and the absorption peak of 86 % at normal incidence. Thus, the FOM of the proposed plasmonic sensor can be reached 115RIU-1. By adjusting the structure parameters, the optimized absorption peak can be achieved.
Type of Study:
Research |
Subject:
Special