Terahertz topological photonic waveguide switch for on-chip communication
Terahertz topological photonic waveguide switch for on-chip communication
复制标题
DOI：
10.1364/prj.451344
复制
发表时间：
2022-04-01
影响因子：
7.6
通讯作者：
Sun, Yiwen
中科院分区：
文献类型：
--
作者：
Liu, Xudong;Huang, Jialiang;Sun, Yiwen
太赫兹（THz）拓扑光子结构支持THz信号的无误码传输，具有拓扑鲁棒性，有望在片内/片间通信系统中实现最后一厘米通信。主动和动态可调谐的太赫兹拓扑光子器件尚未在实验上实现。在这里，我们实验证明了太赫兹拓扑开关（270-290 GHz）的基础上谷霍尔光子晶体结构的高电阻率硅衬底，其中太赫兹波可以动态打开/关闭的外部447 nm连续波激光。在泵浦光强度为240 mW mm（2）时，器件的开关比为19 dB。3 dB开关带宽与60 kHz相似。(C)2022中国激光出版社
Terahertz (THz) topological photonic structures are promising for last-centimeter commune on in intra/interchip communication systems because they support bit-error-free THz signal transmission with topological robustness. Active and dynamically tunable THz topological photonic components have not yet been experimentally realized. Here, we experimentally demonstrate a THz topological switch (270-290 GHz) based on a valley Hall photonic crystal structured high-resistivity silicon substrate, in which the THz waves can be dynamically turned on/off by an external 447 nm continuous-wave laser. Our device exhibited an on/off ratio of 19 dB under a pumping light intensity of 240 mW mm(2). The 3 dB switching bandwidth was similar to 60 kHz. (C) 2022 Chinese Laser Press