  Nano-composite films of Tin Sulfide (SnS) and silver (Ag) fabricated by
thermal evaporation showed two prominent peaks in the visible region of their
extinction spectra. Theoretical modeling of the extinction spectra suggest that
these two peaks (500 nm and 580 nm) correspond to the longitudinal mode (LM)
and transverse mode (TM) surface plasmon resonance peaks arising from oblate
silver nano-particles. Using grain size of silver and SnS obtained from
structural and morphological characterizations of the samples and dielectric
constants as per actuals, we have compared the experimental results with those
from theory. The study shows that silver nano-particles efficiently scatters
light and can be used for developing plasmonic based SnS solar cells with
improved efficiencies.
