en A Plasmonic Optical OR Gate Using Gold and Silver Nano Rods in a Photonic Crystal Basis تخصصی Special پژوهشي Research In this paper, using surface plasmon resonance effect, we demonstrate an optical OR gate. We have used gold and silver because of low losses of silver and gold in visible regime compared to other metals. The photonic crystal structure consists of a hexagonal lattice of iron nano rods, with a radius of r=50 nm and lattice constant of ɑ=200 nm, in a background of air. The designed optical gate, works in the wavelength of λ=0.65 μm with the TM (Hz,Ex,Ey) polarization. Simulation of this structure is done using the COMSOL software package. In this paper, using surface plasmon resonance effect, we demonstrate an optical OR gate. We have used gold and silver because of low losses of silver and gold in visible regime compared to other metals. The photonic crystal structure consists of a hexagonal lattice of iron nano rods, with a radius of r=50 nm and lattice constant of ɑ=200 nm, in a background of air. The designed optical gate, works in the wavelength of λ=0.65 μm with the TM (Hz,Ex,Ey) polarization. Simulation of this structure is done using the COMSOL software package. surface plasmon, Photonic crystal, optical gate. surface plasmon, Photonic crystal, optical gate. 129 132 http://opsi.ir/browse.php?a_code=A-10-1-79&slc_lang=en&sid=1 Elyar Pourali Elyar Pourali elyar.pourali@gmail.com 10031947532846001803 10031947532846001803 Yes Tarbiat Modares University Tarbiat Modares University mohammad kazem Moravvej farshi mohammad kazem Moravvej farshi K_farshi@modares.ac.ir 10031947532846001804 10031947532846001804 No Tarbiat Modares University Tarbiat Modares University majid Ebnali Heidari majid Ebnali Heidari ebnali-m@eng.sku.ac.ir 10031947532846001805 10031947532846001805 No shahre kord university shahre kord university zahra Mostashari rad zahra Mostashari rad zrad28@gmail.com 10031947532846001806 10031947532846001806 No Azad University of Qom Azad University of Qom