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理论和数值研究了轴向均匀的三层波导系统中太赫兹表面等离子激元的单向传输行为,三层系统由厚度为d的高介电常数介质层插入到低介电常数介质层和磁光半导体层中间组成。计算结果表明,在外加磁场的作用下,系统存在单向传输的频段。通过金属微米粒子的耦合及调节磁光半导体区域的磁场方向,可以有效控制表面等离子体激元在三端口系统中的传播。
Theoretical and numerical investigation of unidirectional transmission of terahertz surface plasmon polaritons in an axially uniform three-layer waveguide system consists of a high dielectric constant layer of thickness d inserted into a low dielectric constant layer and a magnetic Optical semiconductor layer intermediate composition. The calculation results show that the system has the unidirectional transmission frequency band under the action of applied magnetic field. Through the coupling of metal microparticles and the adjustment of the magnetic field direction of the magneto-optic semiconductor region, the propagation of surface plasmon in the three-port system can be effectively controlled.