Science Advances

Supplementary Materials

This PDF file includes:

  • fig. S1. Raman spectra of the sample from a monolayer (1L), a bilayer (2L), and a trilayer (3L), along with the background from the bare substrate.
  • fig. S2. Comparison of nonlinear microscopy at different excitation wavelengths.
  • fig. S3. Schematic showing the resonant transitions in the SHG process.
  • fig. S4. Stacking-dependent properties in ABA and ABC trilayers.

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