In the Table Note the BWF (Breit-Wigner-Fano) mode at 1550 cm -1 , which is given as a "plasmon mode, only metallic carbons". Both in graphite and in SWNTs, we have the D-band at 1350 cm -1 , one of the dispersive modes in carbon materials . The D-band at 1350 cm -1 has a frequency which "changes by 53 cm -1 as a result of changing the laser energy EL by 1eV" . The modes are usually fitted with Lorentzian line shapes , but the BWF mode requires an asymmetric line shape, the BWF line shape. In the section 3.6, by , we can find described the Breit-Wigner-Fano lineshape as follow. "The G-band of graphite intercalation compounds (GICs), and the G -band feature in the Raman spectra of metallic SWNTs do not have a symmetric line shape". According to Dresselhaus and coworkers, it "can be fitted to a so-called Breit-Wigner-Fano (BWF) lineshape", given in the form: