Baek, I. H. Ahn, K. J. Kang, B. J. Bae, S. Hong, B. H. Yeom, D. -I. Lee, K. Jeong, Y. U. Rotermund, F. 2024-01-20T12:30:37Z 2024-01-20T12:30:37Z 2021-09-05 2013-05-13 0003-6951 https://pubs.kist.re.kr/handle/201004/128057 We investigate transmission characteristics and sheet conductivity of mono- to multi-layer graphene deposited on quartz in the terahertz (THz) frequency region. The free carrier absorption and Fabry-Perot interference between graphene layers give rise to nonlinear decrease of THz transmission from 76.7% to 27% for mono- to 12-layer graphene. These phenomena are well explained with a modified theoretical model based on Drude conductivity. The optical sheet conductivity of multi-layer graphene, made by layer-by-layer random stacking of high-quality mono- layer graphene, at 1 THz exhibits two orders of magnitude higher values than the universal optical conductivity due to intraband transition of intrinsic graphene. (C) 2013 AIP Publishing LLC. English AMER INST PHYSICS DEVICES SPECTROSCOPY TRANSISTORS MODULATORS Terahertz transmission and sheet conductivity of randomly stacked multi-layer graphene Article 10.1063/1.4805074 1 APPLIED PHYSICS LETTERS, v.102, no.19 APPLIED PHYSICS LETTERS 102 19 scie scopus 000320440800009 2-s2.0-84877962112 Physics, Applied Physics Article DEVICES SPECTROSCOPY TRANSISTORS MODULATORS Terahertz Optical conductivity Graphene