Directional control of light by a nano optical Yagi Uda antenna
A Yagi Uda directional antenna the work horse of radiofrequency communications for more than 60 years has now been demonstrated at visible wavelengths. An array of appropriately tuned nanoparticles replicate the reflecting and directing elements of the original design. Directional control of radiation from the nano optical Yagi Uda antenna was experimentally shown.