  A quantized form of Surface Plasmon Polariton (SPP) modes propagating on the
metal thin film is provided, which is based on the Green's tensor method. Since
the media will be considered lossy and dispersive, the amplification and
attenuation of the SPP modes in various dielectric media, by applying different
field frequencies, can be studied. We will also illustrate the difference
between behavior of coherent and squeezed SPP modes in the amplifying media.
