Figure 1 (IMAGE) Moscow Institute of Physics and Technology Caption Shown in violet, the wedge-shaped piece of dielectric material is 2 nanometers thick at its narrowest and is bordered by a sheet of graphene above and a piece of electrically conductive metal below. The needle of a near-field microscope excites regular, "unfocused" plasmons in graphene away from the tapered part of the wedge Credit Daria Sokol/MIPT Press Office Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.