  Optical and electronic properties of two dimensional few layers graphitic
silicon carbide (GSiC), in particular monolayer and bilayer, are investigated
by density functional theory and found different from that of graphene and
silicene. Monolayer GSiC has direct bandgap while few layers exhibit indirect
bandgap. The bandgap of monolayer GSiC can be tuned by an in-plane strain.
Properties of bilayer GSiC are extremely sensitive to the interlayer distance.
These predictions promise that monolayer GSiC could be a remarkable candidate
for novel type of light-emitting diodes utilizing its unique optical properties
distinct from graphene, silicene and few layers GSiC.
