Direct Measurements Of Nonlinear Absorption And Refraction In Solutions Of Phthalocyanines

    Authors

    T. H. Wei; D. J. Hagan; M. J. Sence; E. W. Vanstryland; J. W. Perry;D. R. Coulter

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Keywords

    Optical Nonlinearities; Single-Beam; Physics, Applied

    Abstract

    We report direct measurements of the excited singlet state absorption cross section and the associated nonlinear refractive cross section using picosecond pulses at 532 nm in solutions of phthalocyanine and naphthalocyanine dyes. By monitoring the transmittance and far field spatial beam distortion for different pulsewidths in the picosecond regime, we determine that both the nonlinear absorption and refraction are fluence (energy per unit area) rather than irradiance dependent. Thus, excited state absorption (ESA) is the dominant nonlinear absorption process, and the observed nonlinear refraction is also due to real population excitation.

    Journal Title

    Applied Physics B-Photophysics and Laser Chemistry

    Volume

    54

    Issue/Number

    1

    Publication Date

    1-1-1992

    Document Type

    Article

    Language

    English

    First Page

    46

    Last Page

    51

    WOS Identifier

    WOS:A1992HB49000006

    ISSN

    0721-7269

    Share

    COinS