Identification And Role Of 2-Photon-Excited States In A Pi-Conjugated Polymer
Abbreviated Journal Title
Phys. Rev. Lett.
NONLINEAR OPTICAL SPECTROSCOPY; SINGLE-CRYSTALS; POLYDIACETYLENE; ABSORPTION; SPECTRUM; FILMS; LIGHT; Physics, Multidisciplinary
We have measured the full two-photon absorption (TPA) spectrum in the transparency range of single-crystal polydiacetylene paratoluene-sulfonate (PTS) using z scan. The spectrum consists of three well-defined two-photon excited states superimposed on a continuum of even-parity states. Comparison of the TPA and the one-photon absorption spectra identifies a two-photon accessible state as the lowest excited state of PTS. The accompanying dispersion in the intensity-dependent refractive index coefficient n2 is also reported.
Physical Review Letters
"Identification And Role Of 2-Photon-Excited States In A Pi-Conjugated Polymer" (1994). Faculty Bibliography 1990s. 2956.