Absorption of THz electromagnetic wave in two mono-layers of graphene. (14th April 2016)

• Record Type: Journal Article
• Authors: Reynolds, Cole B; Shoufie Ukhtary, M; Saito, Riichiro
• Is Part Of: Journal of physics. Volume 49:Number 19(2016)
• Publication Date: 2016-04-14
• Subjects: graphene -- optical absorption -- electromagnetic wave; Physics -- Periodicals; 530
• DOI: 10.1088/0022-3727/49/19/195306
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: Nearly 100% absorption of an electromagnetic (EM) wave in terahertz (THz) frequency is proposed for a system consisting of two mono-layers of graphene. Here, we demonstrate that the system can almost perfectly absorb an EM wave with frequency of 2 THz, even though we have a low electron mobility of roughly 1000 cm 2 Vs −1 . The absorption probability is calculated by using the transfer matrix method. We show that the two mono-layers of the graphene system is needed to obtain nearly 100% absorption when the graphene has a relatively low Fermi energy. The absorption dependence on the distance between the graphene layers is also discussed.