Radio frequency signal detection by ballistic transport in Y-shaped   graphene nanoribbons
  We report on the fabrication and room temperature measurements of a high frequency electrical signal detector. The device is based on the ballistic transport in graphene to detect a high frequency signal. The observed response is linear in the considered power range (-40dBm - 0dBm) and exhibits a sensitivity as high as 10 Volts/Watt. Finally the device detected signals up to 50GHz with a maximum response at 10GHz. This device outperforms any previously reported carbon based detectors in frequency response and compares to current state of the art Schottky based detectors in dynamic range. 
George Deligeorgis, Fabio Coccetti, George Konstantinidis and Robert   Plana
cond-mat.mtrl-sci cond-mat.mes-hall