Notake T, Iyoda T, Arikawa T, Tanaka K, Otani C, Minamide H
Center for Advanced Photonics, RIKEN, 519-1399, Aramaki-aza Aoba, Sendai, 980-0845, Japan.
Harris Science Research Institute, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto, 610-0394, Japan.
Sci Rep. 2021 Feb 8;11(1):3310. doi: 10.1038/s41598-020-80510-y.
The capability for actual measurements-not just simulations-of the dynamical behavior of THz electromagnetic waves, including interactions with prevalent 3D objects, has become increasingly important not only for developments of various THz devices, but also for reliable evaluation of electromagnetic compatibility. We have obtained real-time visualizations of the spatial evolution of THz electromagnetic waves interacting with a single metal micro-helix. After the micro-helix is stimulated by a broadband pico-second pulse of THz electromagnetic waves, two types of anisotropic re-emissions can occur following overall inductive current oscillations in the micro-helix. They propagate in orthogonally crossed directions with different THz frequency spectra. This unique radiative feature can be very useful for the development of a smart antenna with broadband multiplexing/demultiplexing ability and directional adaptivity. In this way, we have demonstrated that our advanced measurement techniques can lead to the development of novel functional THz devices.
对太赫兹（THz）电磁波动态行为进行实际测量（而非仅仅模拟）的能力，包括与常见三维物体的相互作用，不仅对于各种太赫兹设备的开发，而且对于电磁兼容性的可靠评估都变得越来越重要。我们已经获得了太赫兹电磁波与单个金属微螺旋相互作用时空间演化的实时可视化结果。在微螺旋受到太赫兹电磁波的宽带皮秒脉冲激发后，随着微螺旋中整体感应电流振荡，会出现两种各向异性的再发射。它们沿正交交叉方向传播，具有不同的太赫兹频谱。这种独特的辐射特性对于开发具有宽带复用/解复用能力和方向适应性的智能天线可能非常有用。通过这种方式，我们证明了我们先进的测量技术能够推动新型功能性太赫兹设备的开发。
