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Ultrafast strain engineering and coherent structural dynamics from resonantly driven optical phonons in LaAlO3

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Academic year: 2021

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Fig. 2 Photo-induced structural dynamics. Transient changes in the intensity of the re fl ected probe pulse ΔR/R (a) and the polarization rotation Δθ B of the probe pulse (b) after excitation of the LaAlO 3 substrate with a mid-infrared pump pulse of 86 meV
Fig. 3 Light-induced excitation and dynamics of oxygen octahedra rotations. a Time-resolved re fl ectivity changes of the probe pulse at the central energy of 1.5 eV after mid-IR excitation at photon energies of 83 and 124 meV
Fig. 4 Tunable shear strain. a Fourier transforms of the measured polarization rotation signals corresponding to strain wave  propaga-tion after excitapropaga-tion with different pump energies hν

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