Figure 4

(a) Dispersion plots of samples at \(\bar{t}=0.25\) and \(\varphi =0\) with nanohole diameter of 800 nm at different photo energies and incident angles. Lines show theory for Bragg plasmons; (b) Mie plasmon absorption for samples with nanohole diameter of 800 nm, showing plasmon mode energy vs t at normal incidence; (c) Angle reflectance scans of complete solar cells as indicated. Color scale is log(reflectance) with red representing high reflectance and blue-white representing low reflectance; (d–i) The cross-sectional views of electric field intensity (E) distributions in patterned devices and planar devices at wavelengths of 733 nm, 860 nm and 916 nm.