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.