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利用飞秒脉冲激光和泵浦探测技术测量了金属超微粒子半导体复合薄膜ＡｇＢａＯ的瞬态光学透过率随延迟时间的变化曲线，观察到了薄膜对光的吸收漂白现象，并在不到２ｐｓ时间内恢复．该现象是薄膜中金属超微粒子内费密能级附近电子被飞秒激光脉冲激发，产生非平衡电子而经历瞬态弛豫造成的．弛豫主要包括非平衡电子越过超微粒子和周围介质的界面位垒进入周围介质，以及非平衡电子同晶格和界面的散射两种过程．超微粒子粒径的差别会引起非平衡电子弛豫时间的差别
The instantaneous optical transmittance of Ag-BaO films with the delay time curve was measured by femtosecond pulse laser and pump-probe technology, and the absorption and bleaching of light by the film was observed. To 2ps time recovery. This phenomenon is caused by the fact that the electrons near the Fermi level in the ultrafine metal particles in the film are excited by the femtosecond laser pulses to generate non-equilibrium electrons and undergo transient relaxation. Relaxation mainly includes the process that the unbalanced electron enters the surrounding medium through the barrier of the interface between the ultrafine particles and the surrounding medium and the scattering of the unbalanced electron isomorphism and the interface. Differences in particle size of ultrafine particles can cause differences in non-equilibrium electron relaxation times