Science Advances

Supplementary Materials

This PDF file includes:

  • Section S1. Possible pathways for excitation of the 40 ± 20–meV coherent superpositions
  • Section S2. Heating effects due to laser excitation
  • Section S3. Emission at negative times
  • Section S4. Correlations between E1, E2, and E3
  • Section S5. Response from LiNbO3
  • Fig. S1. Signal pathways.
  • Fig. S2. Thermal effects.
  • Fig. S3. Apparent signal at negative delays.
  • Fig. S4. 3D spectra from LSCO and projection onto the 2D planes.
  • Fig. S5. Windowed 2D spectra from LiNbO3.
  • References (4451)

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