Two independent research teams have successfully used their infrared near-field microscopes (neaSNOM) for laying down a ghost: visualizing Dirac plasmons propagating along graphene, for the first time. They also demonstrate electric tuning of these plasmons, important for applications. more…

“Gate-tuning of graphene plasmons revealed by infrared nano-imaging”, Z. Fei,  A. S. Rodin,  G. O. Andreev,  W. Bao,  A. S. McLeod et.al., Nature 487, 82-85 (2012)

“Optical nano-imaging of gate-tunable graphene plasmons”, J. Chen, M. Badioli, P. Alonso-González, S. Thongrattanasiri, F. Huth,  R. Hillenbrand & F.  H. L. Koppens et.al., Nature 487, 77-81  (2012)