论文标题
金属中的超快速光致发光：理论及其在银中的应用
Ultrafast photoluminescence in metals: Theory and its application to silver
论文作者
论文摘要
我们研究了光激发金属的瞬时光致发光（PL），该方程考虑了电子电子（E-E）和电子phonon（E-PH）碰撞的效果，其中E-PH耦合函数是从第一原则中计算出的，从而计算出电子传递速率和声音之间的能量传递速率，以计算电子和声音之间的能量传递速率。我们将目前的方案应用于银的瞬时PL，并证明该理论与实验之间的一致性是良好的，其中非平衡电子分布的效果对于适合实验数据很重要。还讨论了纳米级粗糙度在金属表面和E-E UMKLAPP散射对超快电子动力学上的影响。
We study the transient photoluminescence (PL) of photoexcited metals by solving the Boltzmann equation considering the effects of electron-electron (e-e) and electron-phonon (e-ph) collisions, where the e-ph coupling function is calculated from first-principles in order to account for the energy transfer rate between electrons and phonons accurately. We apply the present scheme to the transient PL of silver and demonstrate that the agreement between the theory and experiment is good, where the effect of nonequilibrium electron distribution is significant to fit the experimental data. The effects of the nanoscale roughness at metal surfaces and the e-e umklapp scattering on ultrafast electron dynamics are also discussed.
