Nonlocal communication between two laser light beams is experimented in a
photochromic polymer thin films. Information exchange between the beams is
mediated by the self-induction of a surface relief pattern. The exchanged
information is related to the pitch and orientation of the grating. Both are
determined by the incident beam. The process can be applied to experiment on a
new kind of logic gates.Comment: 7 pages, 4 figures, 2 table