  We calculate the optical properties of atomic-sized core-shell graphene -
boron nitride nanoflakes with triangular shaped crossection using the density
functional theory. The optical properties can be tuned by using different sizes
and proportions of the core-shell materials. Anisotropic effects manifested in
the absorption of unpolarized light with different orientations of the optical
vector are pointed out.

Mesoscale and Nanoscale Physics