[资源] nATuRE CommunICATIons 上一文

From  the  wide  spectrum  of  potential  applications  of  graphene,  ranging  from  transistors  and chemical  sensors  to  nanoelectromechanical  devices  and composites,  the  field  of  photonics and optoelectronics is believed to be one of the most promising. Indeed, graphene’s suitability for high-speed photodetection was demonstrated in an optical communication link operating at  10 Gbit s − 1 .  However,  the  low  responsivity  of  graphene-based  photodetectors  compared
with  traditional  III–V-based  ones  is  a  potential  drawback.  Here  we  show  that,  by  combining graphene with plasmonic nanostructures, the efficiency of graphene-based photodetectors can be increased by up to 20 times, because of efficient field concentration in the area of a p–n junction. Additionally, wavelength and polarization selectivity can be achieved by employing nanostructures of different geometries.