Ultrafast optical nonlinearity in quasi-one-dimensional Mott-insulator $\mathrm{S}{\mathrm{r}}_2\mathrm{Cu}{\mathrm{O}}_3$

T. Ogasawara, M. Ashida, N. Motoyama +7

We report strong instantaneous photoinduced absorption (PA) in the quasi-one-dimensional Mott insulator $\mathrm{S}{\mathrm{r}}_2\mathrm{Cu}{\mathrm{O}}_3$ in the IR spectral region. The observed PA is to an even-p…