Application of Femtosecond Laser Pulse to Nano-Photonics Materials and Devices

Recently, ultrafast laser pulse has provided new measures for the investigation on nonlinear optical materials and devices. In this report, I will firstly review time-resolved experimental setups, including fs time-resolved SNOM system and pump-probe system, in our laboratory. Then I will demonstrate an ultrafast all-optical tunable filter or switch based on two-dimensional nonlinear polymeric photonic crystal made of pure or dye-doped polystyrene. The study on the relaxation dynamics of hot electrons in gold nanostructures and different relaxation was also reported by using the fs-SNOM system. Moreover, the nano/micro-photonic structures fabricated based on multi-photon absorption in both transparent dielectric media and organic polymer in our laboratory will be reviewed.