Toroidal multipole is a special current distribution that has many different characteristics from electric multipole and magnetic multipole distributions. Because of its special properties, the toroidal dipole is a research hotspot in the field of metamaterials and nanophotonics. However, the low scattering of the toroidal dipole moment makes its excitation a challenging task. At present, there are relatively few studies on its specific engineering applications. In this paper, by slotting in the rectangular cavity, the excitation of an equivalent toroidal dipole is successfully achieved over a wide frequency range of 53–58 GHz. Results indicate that under the action of the toroidal dipole, the TE10 mode electromagnetic waves transmitted in the rectangular waveguide are converted into vector beams and are radiated outwards. Further adjusting the spatial distribution of the magnetic dipoles in the toroidal dipoles yields results that indicate that the resonance mode in the slot is still dominated by the magnetic toroidal dipole moment, and the electromagnetic waves radiating outward are vortex beams carrying vector polarization. The scattered energy of each dipole moment inside the antenna is calculated. This calculation verifies that the mass of the vector beam and vector vortex beam is closely related to the toroidal dipole supported by this antenna. The proposed structure can be applied to explorations in vortex filtering, in photon entanglement, and in the photonic spin Hall effect.

设计了一种金属/介质/金属复合光栅与梯度超表面相结合的多功能器件。通过复合光栅的非对称结构实现光的非对称传输，当调制后的波矢量与表面等离极化激元的波矢量相匹配时，金属光栅激发的表面等离极化激元产生单波段光传输；通过梯度超表面实现光的异常反射。当x偏振态光波入射时，不同入射方向可在不同波段激发表面等离极化激元，由于上下光栅的不同周期和非对称的介质环境，光栅可分别在1 128 nm和1 550 nm处实现高透射率；另外在反向入射方向，该器件在1 300~1 400 nm整个波段表现为零吸收，反射率大于90%，可作为反射器。当y偏振态光波入射时，在反向入射方向器件通过相位梯度超表面实现异常反射。该结构可为各种偏振相关的多功能器件和集成光学元件提供参考。

CFQS 装置是中国西南交通大学（SWJTU）和日本国家核融合科学研究所（NIFS）联合设计制造的中国首台准环对称仿星器，为满足装置0.1 T稳态运行的实验要求，需要为其磁体线圈设计相应的电源系统。本设计方案考虑工程实际估算线路阻抗，考虑工程裕度、电源以负载参数的1.2倍进行计算，并建立电源系统的Simulink仿真模型，分析负载电流纹波大小及网侧谐波含量。根据仿真结果优化设计方案，通过在直流侧增加无源滤波器，减小输出电流纹波，分析直流侧电压代数形式，计算滤波器参数，并仿真调节得到更加符合实际需求的滤波器参数，满足装置准环对称位形的分布磁场精度对磁体线圈电流纹波的要求。

设计了一种基于石墨烯的新型可调谐宽带超材料吸收器。该吸收器采用经典夹层结构，包含一个图案化的单层石墨烯超表面、介电层和金属底板。该石墨烯图案的结构由不同尺寸的石墨烯谐振器组成，确保高吸收率的同时能拓宽吸收带宽。研究结果表明，当费米能级Ef为0.9 eV时，吸收器在光源垂直入射条件下能实现2.3~5.2 THz波段90%以上的宽带吸收率，同时通过控制石墨烯的费米能级可以灵活调节吸收器的带宽和吸收性能。此外，基于单元结构的对称设计，吸收器对偏振角度的变化并不敏感，所设计的吸收器结构将促进石墨烯材料在太赫兹波段和新型吸波器件中的广泛应用。