▎ 摘　　要

We demonstrate that the integration of graphene strongly influences optical properties of the subwavelength gratings, opening a way toward nanophotonic devices. By using the Fourier-expansion modal method, we demonstrate that graphene-titanium dioxide nanostructures can be used for designing polarization-insensitive absorbers and biochemical sensors. (C) 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)