Development of Novel Two-Photon Absorbing Chromophores
Abstract
There has been much interest in the development of two-photon absorbing materials and many efforts to understand the nonlinear absorption properties of these dyes, but this area is still not well understood. A computational model has been developed in our lab to understand the nanosecond nonlinear absorption properties that incorporate all of the measured one-photon photophysical parameters of a class of materials called AFX. We have investigated the nonlinear and the photophysical properties of the AFX chromophores including the two-photon absorption cross-section, the excited state cross-section, the intersystem crossing quantum yield, and the singlet and triplet excited state lifetimes using a variety of experimental techniques that include UV-visible, fluorescence and phosphorescence spectroscopy, time correlated single photon counting, ultrafast transient absorption, and nanosecond laser flash photolysis. The model accurately predicts the nanosecond nonlinear transmittance data using experimentally measured parameters.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 2006
- Accession Number
- ADA474846
Entities
People
- Augustine M. Urbas
- Daniel G. Mclean
- James Heinrichs
- Jonathan E. Slagle
- Joy E. Rogers
- Loon-Seng Tan
- Mark Brant
- Paul A. Fleitz
- Richard L. Sutherland
- Thomas M Cooper
Organizations
- Air Force Research Laboratory