Figure 2
From: Plasmonic nanohole array for enhancing the SERS signal of a single layer of graphene in water
Observation of Raman response of the SLG. Raman spectra of SLG on different substrates, covered with either air or water. The spectra are shifted vertically for clarity. Incident laser power P at 532 nm is 211 μW, and integration time t over which the spectrum was calculated is 10 s. Main peaks of Raman spectra of graphene are marked as D, G and 2D. The parameters of the plasmonic nanohole array are as in Fig. 1. The solid lines are Lorentzian fits to the data.
