Figure 2

Grating pitch optimization and absorption spectra. J_tot versus Λ _x and Λ _y for (a) TM, (b) TE, and (c) (TE + TM)/2; (d) J_tot versus Λ _y at Λ _x  = 520 nm with planar case (wo, i.e., without nanopattern design) for reference; P_abs versus Λ _y and λ under (e) TM and (f) TE incidences, where Λ _x  = 520 nm. b/Λ = 0.75 (according to Figure 1) is used in all figures.