title: Amplified spontaneous emission of surface plasmon polaritons with unusual angle-dependent response.
abstract: Loss issues are fundamentally crucial for the application of surface plasmon polaritons (SPPs). In this study the amplified spontaneous emission (ASE) of SPPs in a typical Kretschmann configuration is observed and shows an unusually broadened angular response with increased pump intensity. Theoretical models are further developed to verify the results and understand the amplification of SPPs in Fourier space.
authors.affiliation: Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Science, Beijing 100190, China.
authors.forename: Yu-Hui
authors.initials: YH
authors.lastname: Chen
authors.forename: Jiafang
authors.initials: J
authors.lastname: Li
authors.forename: Ming-Liang
authors.initials: ML
authors.lastname: Ren
authors.forename: Zhi-Yuan
authors.initials: ZY
authors.lastname: Li