Abstract
AbstractThe generation and diffusion dynamics of the optically induced lattice distortion in the relaxed excited state of SrTiO3 are studied by a transient birefringence experiment. The observed signal of the lattice distortion has a component which decays in the millisecond region. Its amplitude shows a nonlinear dependence on the pump power that indicates the relaxed excited state is generated through a multiphoton absorption process.We observed the lattice distortion induced by a separated pump beam from the probe beam. The signal of the lattice distortion appears later as the separation between the pump and probe beams becomes larger. Experimental results suggest that the optically induced lattice distortion diffuses spatially and its direction is along the crystal axes (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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