You Borwen, Iwasa Ryuji, Chen Po-Lun, Hung Tun-Yao, Huang Chih-Feng, Yu Chin-Ping, Lee Hsin-Ying
Department of Physics, National Changhua University of Education, No. 1 Jinde Road, Changhua 500207, Taiwan.
Department of Applied Physics, Faculty of Pure and Applied Sciences, University of Tsukuba, Tennodai 1-1-1, Tsukuba 305-8573, Ibaraki, Japan.
Materials (Basel). 2023 Jun 19;16(12):4463. doi: 10.3390/ma16124463.
Terahertz (THz) plasmonic metamaterial, based on a metal-wire-woven hole array (MWW-HA), is investigated for the distinct power depletion in the transmittance spectrum of 0.1-2 THz, including the reflected waves from metal holes and woven metal wires. Woven metal wires have four orders of power depletion, which perform sharp dips in a transmittance spectrum. However, only the first-order dip at the metal-hole-reflection band dominates specular reflection with a phase retardation of approximately π. The optical path length and metal surface conductivity are modified to study MWW-HA specular reflection. This experimental modification shows that the first order of MWW-HA power depletion is sustainable and sensitively correlated with a bending angle of the woven metal wire. Specularly reflected THz waves are successfully presented in hollow-core pipe wave guidance specified from MWW-HA pipe wall reflectivity.
基于金属丝编织孔阵列(MWW-HA)的太赫兹(THz)等离激元超材料,针对0.1 - 2太赫兹透射光谱中明显的功率损耗进行了研究,其中包括来自金属孔和编织金属丝的反射波。编织金属丝有四个功率损耗量级,在透射光谱中呈现出尖锐的下降。然而,只有金属孔反射带处的一阶下降主导镜面反射,相位延迟约为π。通过修改光程长度和金属表面电导率来研究MWW-HA镜面反射。这种实验性修改表明,MWW-HA功率损耗的一阶是可持续的,并且与编织金属丝的弯曲角度敏感相关。根据MWW-HA管壁反射率在空心管波导中成功呈现了镜面反射的太赫兹波。