Fig. 1. Directly normal spectral irradiance (solid line) and hemispherical spectral irradiance (dashed line) on 37° tilted Sun-facing surface

Fig. 2. 2D-PC structure composed of GaAs and W. (a) Side view; (b) cross-sectional view; (c) top view

Fig. 3. Refractive index and absorption coefficient of different materials versus wavelength. (a) GaAs; (b) tungsten

Fig. 4. Simulated absorption spectra for different R

Fig. 5. Simulated absorption spectra for different p

Fig. 6. Simulated absorption spectra of three absorbers

Fig. 7. Absorptivity of each part in absorber

Fig. 8. Simulated absorption spectrum versus incident angle and wavelength for different light sources. (a) TE mode; (b) TM mode

Fig. 9. Electric field distributions at different wavelengths. (a) 700 nm; (b) 1100 nm; (c) 1400 nm; (d) 2500 nm; (e) 5000 nm

Fig. 10. Absorption spectra for different manufacturing errors