Tailoring Nanowire Lasing Modes via Coupling to Metal Gratings

In this study, we proposed a lasing mode selection scheme based on distributed feedback, achieved via the external nano-manipulation of single zinc oxide nanowires onto an aluminum grating. By orienting the nano-cavity perpendicular to the ridge direction, we identified an additional peak in the emission spectrum on the low-energy side of the gain envelope. As a consequence of the fulfillment of the Bragg condition, such a peak was attributed to a novel hybrid mode dominating the mode competition.