Xanthene dyes in poly(vinyl alcohol) matrix with and without chromium(VI)/electron donor: kinetics of photobleaching

In our laboratories, we have performed many experimental investigations in order to characterize metal ion doped polymer materials, mainly Dichromated Poly(vinyl Alcohol) DC- PVA) and Dichromated Poly(acrylic acid) (DC-PAA), for their use in holography and nonlinear optics. These systems have been employed for recording volume transmission holograms and fabrication of holographic optical elements (HOEs). Moreover, they are attractive photosensitive materials because of their low cost, self-developing nature and high diffraction efficiency.