等离激元隧道结实现电驱动手性发光

Yuanyang Xie†*, Alexey V. Krasavin†, Anatoly V. Zayats* chirality plays a crucial role in a broad range of processes, including light- matter interactions in physics, chemistry, and biology, while quantum tunneling provides a promising mechanism for light generation at the nanoscale. by integrating tunnel junctions with chiral plasmonic nanohelicoids, we achieved electrically induced nanoscale generation of chiral light at the single- particle level. the tunneling- driven resonant excitation of chiral dipolar modes of the nanohelicoids results in emission of a vortex light beam possessing both spin angular momentum with handedness selectivity of more than 0.8 and orbital angular momentum equal in magnitude and opposite in sign. …