Experimental Demonstration of Demagnifying Hyperlens.

The emergence of optical metamaterials opens new opportunities for spatial pattern compression from the micro- to nanoscale. By exploiting strongly anisotropic optical properties of engineered nanostructures, we realize the first experimental demonstration of demagnifying hyperlens enabling optical patterning below the diffraction limit. We show that the diffraction-limited features on a mask can be demagnified to form the subwavelength patterns on the photoresist using visible light.

Spinning light on the nanoscale.

Light beams with orbital angular momentum have significant potential to transform many areas of modern photonics from imaging to classical and quantum communication systems. We design and experimentally demonstrate an ultracompact array of nanowaveguides with a circular graded distribution of channel diameters that coverts a conventional laser beam into a vortex with an orbital angular momentum. The proposed nanoscale beam converter is likely to enable a new generation of on-chip or all-fiber structured light applications.