Tuning the dispersion relation of a plasmonic waveguide via graphene contactYu Zhou, Cheng Wang, Di-Hu Xu, Ren-Hao Fan, Kun Zhang, Ru-Wen Peng, Qing Hu and Mu WangEPL, 107 3 (2014) 34007DOI: https://doi.org/10.1209/0295-5075/107/34007