Nanostructures have a variety of applications in sensors, spectroscopic and optoelectronic devices. Metamaterials have developed into one among the foremost focused research fields in nanooptics and nanomaterials and attract extensive research interests. This is not only due to the rich physics during this kind materials, but also because they're closely associated with some new techniques within the control of terahertz radiation, solar energy management, optical cloaking, antenna systems, etc.