Seo, Minah Lee, Joong Wook Kim, Hwi 2024-01-20T07:00:35Z 2024-01-20T07:00:35Z 2021-09-05 2015-06-14 0021-8979 https://pubs.kist.re.kr/handle/201004/125329 We compare the field transmission characteristics of a freestanding perforated metal film (as a conducsssstor) and a polymethylmethacrylate-graphite composite film (as an absorber) in the terahertz frequency range. The role of dielectric properties of the materials and the contribution of surface waves toward enhanced transmission with periodic and random hole arrays are discussed. Periodic subwavelength hole arrays in metal films do support enhanced terahertz field transmission whereas random arrays do not. In contrast, neither periodic nor random arrays of subwavelength holes punctured in dielectric absorbers support such transmission. Notably, even a dielectric absorber with large holes, which is sufficiently larger than subwavelength holes, can result in features in transmission due to the shape resonance, but the effect is very small. (C) 2015 AIP Publishing LLC. English AMER INST PHYSICS SURFACES ARRAYS TRANSMITTANCE METAMATERIALS PLASMONS FILMS Role of dielectric properties in terahertz field transmission Article 10.1063/1.4922629 1 JOURNAL OF APPLIED PHYSICS, v.117, no.22 JOURNAL OF APPLIED PHYSICS 117 22 scie scopus 000356176100009 2-s2.0-84935850962 Physics, Applied Physics Article SURFACES ARRAYS TRANSMITTANCE METAMATERIALS PLASMONS FILMS Surface waves Dielectric thin films Metallic thin films Dielectric properties Terahertz radiation