other Improvement of the bulk sensitivity and FoM of the plasmonic nanodipole antenna array فناوری اطلاعات و ارتباطات ICT پژوهشي Research In this paper, the sensitivity of a plasmonic nanodipole antenna array for different materials of the metal nanodipole and substrate is calculated by changing the refractive index of the surrounding medium. The performance of our proposed array is studied at two wavelengths of 1310 and 1550 nm, the wavelengths of the second and third telecommunications windows. It is shown that by using the silver (Ag) nanodipole instead of the gold (Au) one, the bulk sensitivity of the nanostructure is improved. By replacing the substrate material from Si to SiO₂, the sensitivity increases up to 1220 and 1150 nm/RIU at the wavelengths of 1310 and 1550 nm, respectively, that is very suitable for sensing applications. Moreover, the figure of merit (FoM) of the plasmonic sensor is calculated for both substrates and nanodipole materials. The maximum value of the FoM is obtained for the nanoantenna array with SiO₂ substrate and Ag nanodipole and it is equal to 14.35. Furthermore, it is shown that by increasing the thickness of the nanodipole, the nanostructure sensitivity and FoM are enhanced Figure of Merit (FoM), Nanoantenna, Optical Response, Sensitivity, Sensor. 0 0 http://jor.iranaict.ir/browse.php?a_code=A-10-62-26&slc_lang=other&sid=1 Samira Amiri سمیرا امیری 10031947532846004382 10031947532846004382 Yes Najmeh Nozhat نجمه نوژت 10031947532846004383 10031947532846004383 No