  We show that the appropriate on-off switching of Josephson coupling between
exciton-polaritons in coupled semiconductor microcavities can reveal the full
capacity for generating entanglement with a recently proposed method which
essentially enhances the nonlinearity of the system. The improvement achieved
with this simple modulation of the coupling is substantial over the case where
it is kept constant. The suggested procedure is expected to find also
application in other research areas, where nonlinear interacting bosons are
encountered.
