[11p-Z24-1~13] 3.9 Terahertz technologies

△ [11p-Z24-13] Super-focusing effect of metal wire for terahertz vortex beam

〇(M1)Mika Inoue¹, Tomoya Okamoto¹, Sotaro Fujiwara¹, Soichiro Aoishi¹, Yuta Hino¹, Shigeki Nashima¹, Takashi Kondo², Seiji Kamba², Tetsuhito Suzuki³, Yuichi Ogawa³, Katsuhiko Miyamoto^4,5, Takashige Omatsu^4,5 (1.Osaka City Univ., 2.Murata Manufacturing Co., Ltd, 3.Kyoto Univ., 4.Chiba Univ., 5.Molecular Chirality Research Center, Chiba Univ.)

Keywords:terahertz, vortex beams, Super-focusing effect

We have investigated the coupling efficiencies between the terahertz (THz) vortex beams and metal wires using FDTD simulations. We observed the enhanced surface electric field propagated side by side with the THz vortex beams. It was found that the enhanced field distribution around the wire waveguide was expanded as the wire diameter approached the beam diameter. These calculated results were suggested that the existence of optimum wire diameter as metal mesh-micro array analysis.