Fig. 2

Normalized theoretical photocurrent density (^NJ_ph) for the hemiellipsoid- and inverted hemiellipsoid-modified GaAs NW arrays as a function of the hemiellipsoid height (h) at different total heights of a 1000, b 2000, and c 3000 nm. The wire diameters (D) are 100, 300 and 500 nm. The red dot line and red dash line in each figure denote the values of ^NJ_ph of 0.90 and 0.95, respectively