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Abstract: Ultrafast relaxation dynamics of an athermal electron distribution isinvestigated in silver films using a femtosecond pump-probe technique with 18fs pulses in off-resonant conditions. The results yield evidence for anincrease with time of the electron-gas energy loss rate to the lattice and ofthe free electron damping during the early stages of the electron-gasthermalization. These effects are attributed to transient alterations of theelectron average scattering processes due to the athermal nature of theelectron gas, in agreement with numerical simulations.



Author: Natalia Del Fatti, Roland Bouffanais, Fabrice Vallée, Christos Flytzanis

Source: https://arxiv.org/







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