  We introduce a matrix method and we derive a formula for phase retardation
effects in plasmonic systems. We analyze the circular dichroic response (CD) of
two orthogonal Au nanorods in detail and we show that, although, theoretically,
circular dichroism for forward scattering is directly proportional to the
dipole-dipole interaction between the particles, CD response of the system can
be much greater in weak coupling due to the trade off between two different
types of phases.
