title: Investigation of optical pump on dielectric tunability in PZT/PT thin film by THz spectroscopy.
abstract: The dielectric spectra of single-layer PbTiO3(PT), single-layer PbZrxTi1-xO3(PZT) and multilayer PZT/PT thin films under an external optical field were investigated at room temperature by time-domain terahertz (THz) spectroscopy. Results showed that the real part of permittivity increased upon application of an external optical field, which could be interpreted as hardening of the soft mode and increasing of the damping coefficient and oscillator strength. Furthermore, the central mode was observed in the three films. Among the dielectric property of the three thin films studied, the tunability of the PZT/PT superlattice was the largest.
authors.forename: Jie
authors.initials: J
authors.lastname: Ji
authors.forename: Chunya
authors.initials: C
authors.lastname: Luo
authors.forename: Yunkun
authors.initials: Y
authors.lastname: Rao
authors.forename: Furi
authors.initials: F
authors.lastname: Ling
authors.forename: Jianquan
authors.initials: J
authors.lastname: Yao