The structure of 2D IPPC slab. (a) Circular rods in square lattice on glass substrate. (b) Schematic and plan view of the structure, showing the polar angle θ and the azimuth angle ϕ of incident light and the high symmetry along Γ−X and Γ−M directions.
Jiang et al. Nanoscale Research Letters 2012 7:335 doi:10.1186/1556-276X-7-335