Optical dephasing in Cu(111) measured by interferometric two-photon time-resolved photoemission
Optical dephasing in Cu(111) measured by interferometric two-photon time-resolved photoemission
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DOI：
10.1103/physrevlett.78.1339
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发表时间：
1997-02-17
影响因子：
8.6
通讯作者：
Heberle, AP
中科院分区：
文献类型：
--
作者：
Ogawa, S;Nagano, H;Heberle, AP
通过干涉双光子时间分辨光电发射新技术，研究了 Cu(111) 上 s,p 能带占据表面态的光学激发引起的偏振动力学。由光学布洛赫方程在类似于 20 fs 的时间尺度上对电荷载流子相断裂碰撞引起的偏振衰减进行建模。光学相位分辨率还允许直接观察激发频率谐波处的非线性偏振振荡，从而导致表面谐波的产生。
The polarization dynamics induced by the optical excitation of the s,p-band derived occupied surface state on Cu(111) are studied by a new technique, interferometric two-photon time-resolved photoemission. The polarization decay due to phase breaking collisions of the charge carriers on an similar to 20 fs time scale is modeled by the optical Bloch equations. The optical phase resolution also allows direct observation of nonlinear polarization oscillations at the harmonics of the excitation frequency, which lead to the surface harmonic generation.