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Published in Vladimir Mitin, Taiichi Otsuji, Victor Ryzhii, Graphene-Based Terahertz Electronics and Plasmonics, 2020
Y. Takatsuka, K. Takahagi, E. Sano, V. Ryzhii, T. Otsuji
Metallic sheets perforated with a periodic array of holes, referred to as metal mesh structures, have extremely high transmittance at wavelengths close to the period of the array. This phenomenon is known as extraordinary optical transmission (EOT). The holes generally limit the transmittance of electromagnetic waves with wavelengths longer than the hole diameter. EOT for metal mesh structures is thought to be caused by the field enhancement effect due to surface plasmon polaritons (SPPs), which are induced when electromagnetic waves are illuminated and that emit transmitted waves through the periodic hole array [6]. EOT with metal mesh structures has been reported in wide electromagnetic wave regions including the THz region [7–10].
Flexible ultrathin metamaterial absorber for wide frequency band, based on conductive fibers
Published in Science and Technology of Advanced Materials, 2018
Young Ju Kim, Ji Sub Hwang, Bui Xuan Khuyen, Bui Son Tung, Ki Won Kim, Joo Yull Rhee, Liang-Yao Chen, YoungPak Lee
Electromagnetic (EM) metamaterials (MMs), artificially engineered by periodically-arranged meta-elements which are smaller than the operating wavelength, exhibits special responses to the incident EM wave, such as negative-refraction index [1], chirality [2], extraordinary optical transmission [3], electromagnetically induced transparency [4], and so forth. The designed structures, structural parameters, and properties of employed materials determine the electric permittivity [] and the magnetic permeability [] of overall MMs, based on the effective medium theory [5]. The main reason for the attention to MMs is that they can find extraordinary application such as invisibility cloak [6], super lens [7] and perfect absorbers [8].