supported by Fund of State Key Laboratory of Information Photonics and Optical Communications(Beijing University of Posts and Telecommunications),People’s Republic of China;the National Natural Science Foundation of China(Grant nos.51572033,51072182,51572241 and51172208);the Fundamental Research Funds for the Central Universities(Grant no.2014RC0906);China Postdoctoral Science Foundation Funded Project(2014M550661)
Surface plasmon polariton(SPP) is electro-magnetic wave coupled to free electron oscillations near the surface of metal, and has been used to improve the photoelectric properties in many optoelectronic devices. In the...