光形变团簇中的红外电子模
Infrared electron modes in light deformed clusters
摘要：
利用含时局域密度近似（TDLDA）研究了光变形钠团簇中价电子的红外四极模（IRQM）。IRQM由角动量分量$λμ=$ 20、21和22分类，其$μ$分支由簇变形分离。在低光谱密度的轻团簇中，IRQM与特定的电子-空穴激发明确相关，从而可以获得费米表面附近的单电子光谱（HOMO-LUMO区域）。大部分IRQM是由集团形变决定的，因此可以作为平均场中形变效应的灵敏探针。IRQM分支$λμ=$ 21与磁剪模式耦合，这给出了检测后者的机会。我们讨论了双光子过程，拉曼散射（RS），受激发射泵浦（SEP）和受激绝热拉曼通道（STIRAP），作为相关的工具来观察IRQM。提出了一种新的检测聚类中IRQM种群的方法。
英文摘要：
Infrared quadrupole modes (IRQM) of the valence electrons in light deformed sodium clusters are studied by means of the time-dependent local-density approximation (TDLDA). IRQM are classified by angular momentum components $λμ=$20, 21 and 22 whose $μ$ branches are separated by cluster deformation. In light clusters with a low spectral density, IRQM are unambiguously related to specific electron-hole excitations, thus giving access to the single-electron spectrum near the Fermi surface (HOMO-LUMO region). Most of IRQM are determined by cluster deformation and so can serve as a sensitive probe of the deformation effects in the mean field. The IRQM branch $λμ=$21 is coupled with the magnetic scissors mode, which gives a chance to detect the latter. We discuss two-photon processes, Raman scattering (RS), stimulated emission pumping (SEP), and stimulated adiabatic Raman passage (STIRAP), as the relevant tools to observe IRQM. A new method to detect the IRQM population in clusters is proposed.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
