Kupersztych J, Monchicourt P, Raynaud M
CEA/Saclay, DSM/DRECAM/SPCSI, 91191 Gif-sur-Yvette Cedex, France.
Phys Rev Lett. 2001 May 28;86(22):5180-3. doi: 10.1103/PhysRevLett.86.5180.
Photoelectrons emitted from a gold target via a surface-plasmon-assisted multiphoton photoelectric process under a femtosecond laser pulse of moderate intensity are much more energetic than in an ordinary photoeffect without electron collective excitation. The phenomenon is interpreted in terms of time-dependent ponderomotive acceleration of the particles by the resonant field localized at the metal surface. The amplitude of the plasmon resonance may be directly estimated by means of the electron energy spectra.
在中等强度的飞秒激光脉冲作用下，通过表面等离子体辅助多光子光电过程从金靶发射出的光电子比在没有电子集体激发的普通光电效应中能量更高。该现象可根据金属表面局域的共振场对粒子的含时有质动力加速来解释。等离子体共振的幅度可通过电子能谱直接估算。
