Details

Autor(en) / Beteiligte

• Jiang, B-Y
• Ni, G X
• Pan, C
• Fei, Z
• Cheng, B
• Lau, C N
• Bockrath, M
• Basov, D N
• Fogler, M M

Titel

Tunable Plasmonic Reflection by Bound 1D Electron States in a 2D Dirac Metal

Ist Teil von

• Physical review letters, 2016-08, Vol.117 (8), p.086801-086801, Article 086801

Ort / Verlag

United States

Erscheinungsjahr

2016

Quelle

American Physical Society

Beschreibungen/Notizen

• We show that the surface plasmons of a two-dimensional Dirac metal such as graphene can be reflected by linelike perturbations hosting one-dimensional electron states. The reflection originates from a strong enhancement of the local optical conductivity caused by optical transitions involving these bound states. We propose that the bound states can be systematically created, controlled, and liquidated by an ultranarrow electrostatic gate. Using infrared nanoimaging, we obtain experimental evidence for the locally enhanced conductivity of graphene induced by a carbon nanotube gate, which supports this theoretical concept.