Abstract

The present interest in the PHB optical memories has motivated research into finding materials which have weak electron-phonon coupling between the guest impurity and the host system. The magnitude of the linear electron-phonon coupling strength can be obtained from the Debye- Waller factor, the relative strength of the zero-phonon line and phonon sideband of the homogeneous spectrum. The Debye-Waller factor can be determined readily in crystals; in amorphous solids, however, the large inhomogeneous spectral broadening masks the individual homogeneous spectrum. Out of the many nonlinear spectroscopic techniques, our group utilized the femtosecond accumulated photon echo technique with phase modulation¹ to examine the polymer dependence of the electron-phonon coupling in amorphous dye-doped polymer systems.

© 1991 Optical Society of America