Engineering of the Second‐Harmonic Emission Directionality with III–V Semiconductor Rod Nanoantennas

We demonstrated a method to control and redirect the directionality of  second‐harmonic generation emission by engineering the geometry and position of rod nanoantennas, fabricated from sliced III-V semiconductor nanowires. We built a phase array of rod nanoantennas to tailor nonlinear optical response by adjusting their length and position to achieve a targeted phase difference.