Experimental demonstration of graphene plasmons working close to the   near-infrared window
  Due to strong mode-confinement, long propagation-distance, and unique tunability, graphene plasmons have been widely explored in the mid-infrared and terahertz windows. However, it remains a big challenge to push graphene plasmons to shorter wavelengths in order to integrate graphene plasmon concepts with existing mature technologies in the near-infrared region. We investigate localized graphene plasmons supported by graphene nanodisks and experimentally demonstrated graphene plasmon working at 2 {\mu}m with the aid of a fully scalable block copolymer self-assembly method. Our results show a promising way to promote graphene plasmons for both fundamental studies and potential applications in the near-infrared window. 
Zhongli Wang, Tao Li, Kristoffer Almdal, N. Asger Mortensen, Sanshui   Xiao, Sokol Ndoni
physics.optics cond-mat.mes-hall