标题： 超快、高强度下金属纳米结构附近的自发和受激拉曼散射 显示英文标题

标题： Spontaneous and Stimulated Raman Scattering near Metal Nanostructures in the Ultrafast, High-Intensity regime

摘要： 拉曼散射中包含原子反转可以在等离子体环境中显著改变场的动力学。 我们的计算表明，大的局域场和飞秒脉冲结合会产生以下结果：(i)热点内的布居反转；(ii)增益饱和；以及(iii)转换效率表现出类似于受激发射的切换过渡，跨越十二个数量级。 虽然在拉曼散射中通常忽略原子反转，但我们证明，在某些情况下，需要全面考虑Bloch矢量的动力学。 显示英文摘要

摘要： The inclusion of atomic inversion in Raman scattering can significantly alter field dynamics in plasmonic settings. Our calculations show that large local fields and femtosecond pulses combine to yield: (i) population inversion within hot spots; (ii) gain saturation; and (iii) conversion efficiencies characterized by a switch-like transition to the stimulated regime that spans twelve orders of magnitude. While in Raman scattering atomic inversion is usually neglected, we demonstrate that in some circumstances full accounting of the dynamics of the Bloch vector is required.