en عمومى General پژوهشي Research We report an experimental study on optical and magneto-optical properties of Cesubstituted yttrium iron garnet thin films incorporating gold nanoparticles. Au nanoparticles were formed by heating Au thin film on cubic quartz and garnet substrate in vacuum chamber and a Ce:YIG layer was deposited on them by the aid of Pulsed laser deposition method. A large enhancement of the longitudinal Kerr effect was obtained in sample with Au nanoparticles on quartz substrate and the effect of substrate material on improving optical and magneto-optical response of samples were investigated. Pulsed laser deposition, Au nanoparticles, longitudinal magneto-optical Kerr effect, Surface plasmon resonance. 29 34 http://ijop.ir/browse.php?a_code=A-10-175-1&slc_lang=en&sid=1 S. M Hamidi m_hamidi@sbu.ac.ir 10031947532846001108 10031947532846001108 Yes Laser and Plasma Research Institute, Shahid Beheshti University M. M Tehranchi 10031947532846001109 10031947532846001109 No Laser and Plasma Research Institute, Shahid Beheshti University