Metal-Dielectric-Graphene Sandwich for Surface Enhanced Raman   Spectroscopy
  Raman intensity of Rhodamine B (RhB) is enhanced by inserting a thin high \k{appa} dielectric layer which reduces the surface plasmon damping at the gold-graphene interface. The results indicate that the Raman intensity increases sharply by plasmonic resonance enhancement while maintaining efficient fluorescence quenching with optimized dielectric layer thickness. 
Xuechao Yu, Jin Tao, Youde Shen, Guozhen Liang, Tao Liu, Yongzhe Zhang   and Qi Jie Wang
physics.optics cond-mat.mes-hall cond-mat.mtrl-sci