Identification And Role Of 2-Photon-Excited States In A Pi-Conjugated Polymer

    Authors

    B. Lawrence; W. E. Torruellas; M. Cha; M. L. Sundheimer; G. I. Stegeman; J. Meth; S. Etemad;G. Baker

    Comments

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    Abbreviated Journal Title

    Phys. Rev. Lett.

    Keywords

    NONLINEAR OPTICAL SPECTROSCOPY; SINGLE-CRYSTALS; POLYDIACETYLENE; ABSORPTION; SPECTRUM; FILMS; LIGHT; Physics, Multidisciplinary

    Abstract

    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.

    Journal Title

    Physical Review Letters

    Volume

    73

    Issue/Number

    4

    Publication Date

    1-1-1994

    Document Type

    Article

    Language

    English

    First Page

    597

    Last Page

    600

    WOS Identifier

    WOS:A1994NZ23700023

    ISSN

    0031-9007

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