Figure 3: Graphene’s loss function and plasmons.
From: Photocurrent in graphene harnessed by tunable intrinsic plasmons

Colour intensity plot of graphene loss function L(q,ω) assuming a doping of 0.33 eV. The calculation includes coupling with the intrinsic optical phonon and the two substrate polar phonons of SiO2 as indicated in the figure. Prominent plasmon damping processes are included in the calculation with models taken from ref. 30. See Supplementary Note 1 for details of calculations. Data points are from absorption experiments such as in Fig. 2a.