Fig. 1: Raman and hot PL spectra of 1L-WSe2.
a Emission and scattering spectrum of 1L-WSe2 at 295K as a function of energy shift with respect to the excitation laser (532 nm~2.33eV). The degenerate in-plane (\(E^{\prime}\)) and out-of-plane (\({A}_{1}^{\prime}\)) Raman mode ~250 cm−1 43, as well as the Si Raman peak ~521 cm−1 47, are prominent in both S and AS. b Magnified portion of the spectrum in yellow in a. This reveals 7 periodic S peaks and 5 AS. Their intensity decreases as a function of the energy shift for both S and AS. c Raman spectra of 1L-WSe2 on SiO2/Si at 488, 514, 532, 633 nm and 295 K, shifted vertically for clarity. d Raman spectra of 1L-WSe2 on different substrates (Au, hBN and suspended) at 295K and 514 nm excitation. Black points: experimental data. Red lines: fitted cascades. Orange line: sum of fitted Lorentzians.
