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
       
Radiation power enhancement of SPCLS at the operating frequency: (a) dependence of the enhancement on e-beam energy for SPCLS with 30 nm Ag film; (b) dependence of the enhancement on e-beam energy for SPCLS with 50 nm Ag film. The insets show the enhancement of all of the frequency components in SPCLS.