Abstract
Measurements of ultrafast light scattering within a hemisphere are performed for statistical analysis of nonequilibrium processes in epitaxial film. A Gerchberg–Saxton error reduction algorithm is applied for accurate calculation of a surface autocorrelation function from light scattering data and for partial reconstruction of a power spectral density function. Upon ultrafast photoinduced phase transition of , the elastic light scattering reveals anisotropic grain-size-dependent dynamics. It was found that the transition rate depends on the optical absorption and orientation of grains with respect to polarization of the pump pulse. An observed stepwise evolution of surface autocorrelation length and transient anisotropy of the scattering field presumably originates from complex multistage transformation of lattice on a subpicosecond time scale.
© 2015 Optical Society of America
Full Article | PDF ArticleMore Like This
Matteo Rini, Andrea Cavalleri, Robert W. Schoenlein, René López, Leonard C. Feldman, Richard F. Haglund, Lynn A. Boatner, and Tony E. Haynes
Opt. Lett. 30(5) 558-560 (2005)
Nardeep Kumar, Armando Rúa, Jennifer Aldama, Karla Echeverría, Félix E. Fernández, and Sergiy Lysenko
Opt. Express 26(11) 13773-13782 (2018)
Zhao-Hui Zhai, Si-Chao Chen, Liang-Hui Du, Sen-Cheng Zhong, Wanxia Huang, Ze-Ren Li, Harald Schneider, Qiwu Shi, and Li-Guo Zhu
Opt. Express 26(21) 28051-28066 (2018)