Coherent and tunable radiation with power enhancement from surface plasmon polaritons*
Gong Sen†, Zhong Ren-Bin, Hu Min, Chen Xiao-Xing, Zhang Ping, Zhao Tao, Liu Sheng-Gang
       
(a) Schematic of SPCLS: Ag film is supported by dielectric medium Bi3Ge4O12 (BGO). (b) Dispersion curve of SPCLS: film thickness d = 50 nm, the medium is BGO. The shaded part between the light lines in vacuum and in the medium is the radiation region.