Observation of multilayer graphene sheets using terahertz phase contrast microscopy

Pramana

DENGKE PAN¹  ZHIKUN LIU¹  LI GENG¹  YANAN XIE1¹  PAN SONG¹ 

[1] School of Communication and Information Engineering, Key Laboratory of Specialty Fibre Optics and Optical Access Networks, Shanghai University, Shanghai 200072, China$$

关键词: Graphene;    terahertz radiation;    surface conductivity;    phase contrast microscopy;    transmission function.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Although it is important for the study of graphene, identifying and characterizing the number of graphene layers is challenging. In this paper, we calculate graphene’s transmission.The result shows that the phase change is more sensitive than the intensity change when light passes through graphene in some THz frequencies. Based on this fact, a simple route is presented for identifying the single or few layers of graphene sheets by using terahertz phase contrast microscopy (TPCM). The route is fast, and easy to be carried out.

【 授权许可】

Unknown