期刊
PHYSICAL REVIEW LETTERS
卷 86, 期 22, 页码 5180-5183出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.86.5180
关键词
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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.
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