2012/10/18 by Guoxi Wang, Hua Lu, Hua Lü +2
Engineering · Physics and Astronomy · #Photonic Crystals and Applications #Photonic and Optical Devices #Plasmonic and Surface Plasmon Research
paper · doi:10.1088/0957-4484/23/44/444009
openalex publication_date 2012/10/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
We have proposed and numerically investigated an all-optical switch based on a metal-insulator-metal waveguide with graded nonlinear plasmonic gratings. The influences of grating depth and refractive index of a Kerr nonlinear medium on the transmission of the switch are exactly analyzed by utilizing transmission line theory. The finite-difference time-domain simulation results show that the highly compact structure possesses excellent switch function by tuning the incident electric field intensity. In addition, the simulation results show that this all-optical switch has an ultrawide operating frequency regime and femtosecond-scale response time (~130 fs). Such a switch can find potential applications for all-optical signal processing and optical communication.