<i>Nature Nanotechnology</i> (IMAGE) Elhuyar Fundazioa Caption THz plasmons of extremely short wavelength propagate along the graphene sheet of a THz detector, as visualized with photocurrent images obtained by scanning probe microscopy. Credit CIC nanoGUNE Usage Restrictions CIC nanoGUNE 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.