[16a-Z31-1~11] 17.2 Graphene

[16a-Z31-5] Characterization of Electrical Properties for Graphene by Electrical Circuit Model with Transmission THz-TDS

〇(M1)Hiroki Suzuki¹, Takashi Fujii^1,2, Shinichiro Mouri¹, Toshiyuki Iwamoto², Yuki Ueda³, Shigeya Naritsuka³, Makoto Nakajima⁴, Tsutomu Araki¹ (1.Ritsumeikan Univ., 2.PNP, 3.Meijo Univ., 4.Osaka Univ.)

Keywords:graphene, Tera Hertz, TDS

We aim to apply the THz time-domain spectroscopy method to graphene analysis. So far, graphene has been considered as a three-dimensional structure with a thickness of 0.3 nm and analyzed optically. However, this model has a problem that the thickness variation and the effective mass of graphene cause errors in the electrical properties. In order to solve this problem, we developed an electrical circuit model that treats graphene as a thin film of infinitesimal thickness with impedance Z_g, which is independent of thickness and effective mass.