Calculated temporal evolution of the probability for detached electrons from surface in quantum well for two cases: (a) superposition of two levels and 4; (b) superposition of five excited states centered around . The electric field is fixed at directed along the axis.
The dependence of the detached electron wave packet on the electric field. The wave packet was created by a superposition of five levels in the vicinity of same as Fig. 1(b) and the electric fields are (a) and (b) .
Quantum beats observed after the coherent excited states for the first 1000 fs with quantum numbers and 4. The dashed line shows the envelop of the exciting pulse.
Quantum beats observed after the coherent excited states in the vicinity of , five levels (6–10).
Calculations of the wave function penetration into the crystal Cu(100) and the lifetimes of the states in different field strengths.
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