Manipulation light Using Nanostructures
Qihuang Gong, Xiaoyong Hu, Jiangjun Chen, Zhi Li, Song Yue and Hong
Yang
Department of Physics & State Key Laboratory for Mesoscopic Physics,
Peking University, Beijing 100871, CHINA
Email: qhgong@pku.edu.cn, Tel: 86-10-62765884
Recently, using nano/micro-structure photonic materials to
manipulate the propagation of light has attracted much attention for its
potential applications in photonic circuits. In this report, the experimental
investigations based on two kind nanostructure materials, photonic crystal
and metallic nanostructure, were performed.
Based on metallic nanostructures, ultracompact plasmonic devices
including SPP unidirectional generator, splitter and switch were
experimentally demonstrated using an asymmetric single-nanoslit.
Moreover, ultrafast optical modulation based on plasmonic lens was
experimentally studied by using a femtosecond time-resolved scanning
near-field optical microscope. An ultrasmall and ultrafast all-optical
modulation spot was successfully achieved inside a thin gold film.
Using two-dimensional photonic crystal made of the composite
materials with large and fast third-order optical nonlinearity, ultrafast and
low threshold all-optical switching was demonstrated. High switching
efficiency of 80%, low pump intensity of the order of 0.1-1MW/cm2 and
picosecond switching time were achieved.