Fig. 3
From: Coherent anti-Stokes Raman spectroscopy of single and multi-layer graphene
Graphene CARS spectra. CARS spectra of a FLG and b SLG as a function of Raman shift \(\left( {\tilde \nu - \tilde \nu _{\mathrm{P}}} \right)\) at different ΔT between the beams at tunable ωS and fixed ωP. In a, colored dashed lines are fits to the data using Eq. (1) and the nonlinear polarization obtained from Eqs. (19) and (20). Vertical black dashed lines indicate three energies \(( {\tilde \nu _{1,2,3} - \tilde \nu _{\mathrm{P}} = 1545,1576,1607{\mathrm{cm}}^{ - 1}})\), taken as reference for the FLG CARS images in Fig. 5
