Plasmon reflection reveals local electronic properties of natural graphene wrinkles

• 来源期刊: 中国物理B（英文版）
• 关键词: graphene plasmons wrinkle reflection electronics
• 年，卷（期）: 2019,（11）
• 页码范围: 80-85
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/1674-1056/ab46a2

摘要

We systematically studied surface plasmons reflection by graphene wrinkles with different heights on SiC substrate.Combined with numerical simulation,we found that the geometry corrugation of a few nanometer height wrinkle alone does not causes a reflection of graphene plasmons.Instead,the separated wrinkle from substrate exhibits a nonlinear spatial Fermi energy distribution along the wrinkle,which acts as a heterojunction.Therefor a higher graphene wrinkle induces a stronger damped region when propagating graphene surface plasmons encounter the wrinkle and get reflected.