Multi-cycle reconfigurable THz extraordinary optical transmission using chalcogenide metamaterials

• DOI: 10.29026/oes.2022.210010
• Publication Date: 2022-01-20T07:31:32Z
• Authors: Tun Cao; ; Meng Lian; Xieyu Chen; Libang Mao; Kuan Liu; Jingyuan Jia; Ying Su; Haonan Ren; Shoujun Zhang; Yihan Xu; Jiajia Chen; Zhen Tian; Dongming Guo
• Keywords: Extraordinary optical transmission

Metamaterials composed of metallic antennae arrays are used as they possess extraordinary optical transmission (EOT) in the terahertz (THz) region, whereby a giant forward light propagation can be created using constructive interference tunneling surface plasmonic waves. However, numerous applications THz meta-devices demand an active manipulation beam free space. Although some studies have been carried out to control EOT for few these based upon electrical modulation phenomenon, and novel strategies required actively dynamically reconfigurable meta-devices. In this work, we experimentally present that resonance coupled optically chalcogenide metamaterials which offers reversible all-optical light. A efficiency 88% at 0.85 is observed metamaterials, gold (Au) circular aperture array sitting on non-volatile phase change material (Ge₂Sb₂Te₅) film. This comes up with robust ultrafast over 20 times switching, excited by nanosecond pulsed laser. The measured data good agreement finite-element-method numerical simulation. work promises modulators significant on/off ratios fast speeds.