Fig. 3: Dispersions and linewidths of the plasmons in 2M-WS2 disks.
From: Tunable anisotropic van der Waals films of 2M-WS2 for plasmon canalization
a Dispersions of plasmons along the b- and c-axis in 2M-WS2 disks at room temperature and 81 K, represented by red and blue spheres, respectively. The relations between plasmon frequency \(\omega\) and wave vector \(q\), which scale as \(\omega \propto \sqrt{q}\) and \(\omega \propto q\) were used to fit the plasmon dispersions along the c- and b-axis, respectively. The loss function at room temperature is shown as a pseudocolor map. b Extracted linewidth versus frequency of the plasmons in Fig. 2a, b. The light gray dashed and dashed dot lines represent the corresponding fitting curves. c Isofrequency contours of the plasmons obtained through maxima of the loss functions and the extracted conductivities of the film in Fig. 1.
