  Light responsive devices employing molecular photo-switches are interesting
for displays and dynamic light filtering. In this work, polymeric microcavities
embedding a layer of photochromic compound have been studied by means of the
transfer matrix method. Different polymers, such as poly vinyl carbazole, poly
styrene and cellulose acetate, have been used. A microcavity that includes
random one-dimensional photonic structures sandwiching the photochromic layer
has also been studied. Propagation of light pulses through the microcavities
has been analysed.
