Extended Data Fig. 8: Polarization-resolved SHG intensity.
From: Tuning layer-hybridized moiré excitons by the quantum-confined Stark effect
a, b, Second-harmonic intensity as a function of the polarization angle of the excitation light from WSe2/WS2 bilayers with a twist angle close to 0° (a) and 60° (b). Black, red and blue lines represent measurements on the isolated WSe2 monolayer, isolated WS2 monolayer, and bilayer, respectively. Samples are excited by linearly polarized light under normal incidence. The cross-polarized component of the second harmonic is detected. The second-harmonic radiation from each monolayer is added constructively in the 0° bilayer sample (a) and destructively in the 60° bilayer sample (b).
