Extended Data Fig. 2: Second harmonic generation polarization scan. | Nature

Extended Data Fig. 2: Second harmonic generation polarization scan.

From: Photoinduced twist and untwist of moiré superlattices

Extended Data Fig. 2

Second harmonic generation (SHG) polarization scan on the 2° (a) and 57° (b) WSe2/MoSe2 heterobilayers used in UED measurements. The alignment of crystal axes in the two layers are determined by constructive and destructive interference. The SHG signals are excited using a 1030 nm femtosecond laser with  < 200 fs pulse duration at room temperature, and captured by an EM CCD detector.

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