Figure 1

Schematic of the tilted silicon nanowire array structure. The nanowires sit on a perfectly electric conductor and are defined by the height h, circular cross-sectional diameter d, and tilt with respect to the zenith β. The nanowires form a two-dimensional lattice defined by the lattice vectors ${\overrightarrow{a}}_1$ and ${\overrightarrow{a}}_2$, where $\left|{\overrightarrow{a}}_2\right|=a$ and $\left|{\overrightarrow{a}}_1\right|=a/\text{cos}\beta$. The incidence angle of the incoming radiation is defined with respect to the negative z-direction.