Extended Data Fig. 3: Temperature difference of the absorption spectra, \({{\boldsymbol{A}}}_{{{\boldsymbol{V}}}_{{\bf{G}}},{{\boldsymbol{T}}}_{{\bf{e}}}}\,-{{\boldsymbol{A}}}_{{{\boldsymbol{V}}}_{{\bf{G}}},{{\boldsymbol{T}}}_{{\bf{0}}}}\), obtained by the double-modulation measurement. | Nature

Extended Data Fig. 3: Temperature difference of the absorption spectra, \({{\boldsymbol{A}}}_{{{\boldsymbol{V}}}_{{\bf{G}}},{{\boldsymbol{T}}}_{{\bf{e}}}}\,-{{\boldsymbol{A}}}_{{{\boldsymbol{V}}}_{{\bf{G}}},{{\boldsymbol{T}}}_{{\bf{0}}}}\), obtained by the double-modulation measurement.

From: Observation of hydrodynamic plasmons and energy waves in graphene

Extended Data Fig. 3

The absorption shows a symmetric profile with respect to VG = −0.1 V, the back-gate voltage associated with the charge-neutrality point.

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