Enhancement of photonic density of states in finite graphene multilayers

作     者：Ashley M. DaSilva You-Chia Chang Ted Norris Allan H. MacDonald 

作者机构：Department of Physics The University of Texas at Austin Austin Texas 78712-1192 USA Applied Physics Program The University of Michigan Ann Arbor Michigan 48109 USA Center for Ultrafast Optical Science The University of Michigan Ann Arbor Michigan 48109 USA Department of Electrical Engineering and Computer Science The University of Michigan Ann Arbor Michigan 48109 USA 

出 版 物：《Physical Review B》 (Phys. Rev. B Condens. Matter Mater. Phys.)

年 卷 期：2013年第88卷第19期

页      面：195411-195411页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：National Science Foundation  NSF  (1120923) 

摘      要：We consider the optical properties of finite systems composed of a series of graphene sheets separated by thin dielectric layers. Because these systems respond as conductors to electric fields in the plane of the graphene sheets and as insulators to perpendicular electric fields, they can be expected to have properties similar to those of hyperbolic metamaterials. We show that under typical experimental conditions graphene/dielectric multilayers have enhanced Purcell factors, and enhanced photonic densities of states in both the terahertz (THz) and midinfrared (mid-IR) frequency range. These behaviors can be traced to the coupled plasmon modes of the multilayer graphene system. We show that these results can be obtained with just a few layers of graphene.