Optical nano-imaging of gate-tunable graphene plasmons

Tunable Terahertz Hybrid Metal-Graphene Plasmons.

We report here a new type of plasmon resonance that occurs when graphene is connected to a metal. These new plasmon modes offer the potential to incorporate a tunable plasmonic channel into a device with electrical contacts, a critical step toward practical graphene terahertz optoelectronics. Through theory and experiments, we demonstrate, for example, anomalously high resonant absorption or tr...

Gate-tunable photoemission from graphene transistors.

In this Letter, we report gate-tunable X-ray photoelectron emission from back-gated graphene transistors. The back-gated transistor geometry allows us to study photoemission from graphene layer and the dielectric substrate at various gate voltages. Application of gate voltage electrostatically dopes graphene and shifts the binding energy of photoelectrons in various ways depending on the origin...

Photocurrent in graphene harnessed by tunable intrinsic plasmons - Supplementary Information

Tunable graphene-based plasmonic waveguides: nano modulators and nano attenuators

O R IG IN A L P A P ER Abstract A modulation principle and method, the gatevoltage-controlled mode-guiding switching/mode-cutoff mechanism, is proposed and numerically investigated to achieve the modulation/attenuation function. The propagating attenuation of the graphene 2D waveguide as a function of the Fermi level of the cladding is analyzed. Different modes with low or high attenuations in ...

Hybrid Metal-Graphene Plasmons for Tunable Terahertz Optoelectronics

Mohammad M. Jadidi, a Andrei B. Sushkov, Rachael L. Myers-Ward, Anthony K. Boyd, Kevin M. Daniels, D. Kurt Gaskill, b Michael S. Fuhrer, 4, c H. Dennis Drew, d and Thomas E. Murphy e Institute for Research in Electronics & Applied Physics, University of Maryland, College Park, MD 20742, USA Center for Nanophysics and Advanced Materials, University of Maryland, College Park, Maryland 20742, USA ...