OPTICAL PHASE CONTROL OF COHERENT ELECTRON DYNAMICS IN METALS
OPTICAL PHASE CONTROL OF COHERENT ELECTRON DYNAMICS IN METALS
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DOI：
10.1103/physrevlett.79.4649
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发表时间：
1997-12
影响因子：
8.6
通讯作者：
H. Petek;A. Heberle;W. Nessler;H. Nagano;S. Kubota;S. Matsunami;N. Moriya;S. Ogawa
中科院分区：
文献类型：
--
作者：
H. Petek;A. Heberle;W. Nessler;H. Nagano;S. Kubota;S. Matsunami;N. Moriya;S. Ogawa
通过激发光的光学相位控制金属中激发的电子分布。来自Cu（111）表面的双光子光发射可以由一对相互延迟固定为±0.025 fs的15fs激光脉冲激发，也可以由单个频率啁啾脉冲激发。作为双光子激发过程中的光学相干性的结果，光电发射光谱不仅取决于频率，如在常规光谱学中，而且取决于激发光的相位。这可能是多光子电离中的普遍现象。
The control of electron distribution excited in a metal through optical phase of the excitation light is demonstrated. Two-photon photoemission from the Cu (111) surface is excited either by a pair of∼ 15 fs laser pulses with a mutual delay fixed to an accuracy of±0.025 fs, or by a single, frequency-chirped pulse. As a consequence of optical coherence in the two-photon excitation process, the photoemission spectra do not only depend on the frequency, as in conventional spectroscopy, but also on the phase of the excitation light. This may be a general phenomenon in multiphoton ionization.