Figure I | Theoretical prediction of record-low plasmonic loss of potassium metal. (IMAGE)
Caption
Figure I | Theoretical prediction of record-low plasmonic loss of potassium metal. a, The electron umklapp scattering process of alkali metal (left) and non-alkali metals (right) between two Fermi surfaces (FSs) in adjacent Brillouin zones (BZs) are shown in the upper panel, respectively. The momentum gap described by qgap, and qph is the scattering phonon momentum. In the bottom panel, there is a comparison of band structures as well as the potential optical transitions induced by N (red) and U (blue) electron scattering processes for alkali metals (left panel) and non-alkali metals (right panel), respectively. The green dashed lines correspond to the positions of the Brillouin zone. b, The (γepN,γepU) resolved optical loss phase diagram among versatile plasmonic metals in terms of the quantitatively calculated U and N scattering-enabled e-p scattering rate at room temperature (T = 298 K). Here, the size of circles represents the magnitude of the total calculated damping rate.
Credit
Lin Zhou et al.
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