Fig. 4
Polarization dependence of intralayer Raman modes under strain. a Polarized Raman spectra of strained bilayer MoS2 (ε = 1.28%) for main intralayer modes. The incident polarization (θ i) is fixed at 0° and the spectra are measured as a function of ψ defined in Fig. 1a. Empty and filled diamond and circle symbols are defined in Fig. 3. Normalized polar plots of b E g (E g − and E g +) and c A 1g modes
