Ultrafast decoupling of polarization and strain in ferroelectric BaTiO3

Source data of figures in the main text - Figure 1: Photoinduced structural dynamics and time evolution of strain. - Figure 2: Photoinduced ferroelectric polarization and electron dynamics. Source data of figures in the supplementary information - Figure S1. Diffraction intensity drop. - Figure S2. Contribution of Debye-Waller factor. - Figure S3. Electron and lattice temperature as a function of delay t. - Figure S4. η(t) with pump fluence Fin = 1.4mJcm−2. - Figure S5. Lattice temperature as a function of delay and depth. - Figure S6. Deformation potential and thermoelastic contributions to the average change of strain. - Figure S7. Temporal and spatial dependence of lattice temperature and strain, and diffraction curves at fixed delays, with Fin = 2.7 mJcm−2. - Figure S8. Temporal and spatial dependance of lattice temperature and strain, and diffraction curves at fixed delays, with Fin = 1.4 mJcm−2. - Figure S9. Delay dependence of the tensor elements χ(2)xxz , χ(2)zxx , and χ(2)zzz . - Figure S10. SHG and R maximum relative change as a function of pump fluence. - Figure S11. SHG and R time traces at different fluences. - Figure S12. Photoexcited electron density as a function of delay t. - Figure S13. Transmittance profile of 266 nm beam in BTO/SRO/GSO. - Figure S14. θ-2θ scan. - Figure S15. c parameters of BTO, SRO and GSO as a function of sample temperature. - Figure S16. Reciprocal space map. - Figure S18. Piezoresponse force microscopy. - Figure S19. SHG plots at different azimuthal angles. - Figure S20. Comparison of I_XRD(Eν) at negative delays and laser off. - Figure S21. Determination of t0 in tr-XRD experiments. - Figure S22. Beam arrival monitor. - Figure S23. BTO, SRO and GSO (001) diffraction peaks. - Figure S24. Comparison of simulated and experimental I_XRD(Eν) at negative delay. - Figure S25. SHG intensity as a function of probe pulse energy.