Compact multimode vortex-wave radiator enabled by quasi-1D spoof plasmons
摘要
We demonstrate a compact multimode vortex-wave radiator based on quasi-one-dimensional spoof surface plasmon polaritons(quasi-1D SSPP).The structure supports simultaneous generation of four distinct orbital angular momentum modes l=1,-2,3,-4 at a single frequency.Enabled by the high propagation constant and strong field confinement of the dispersion-engineered spoof surface plasmon polaritons(SSPP)waveguide,the device achieves a footprint of only 0.9λwhile maintaining high mode purity and low intermodal crosstalk.Although implemented in the microwave regime for experimental accessibility,the subwavelength corrugated geometry and slow-wave phase control mechanism are directly scalable to terahertz and infrared frequencies.This work provides a practical platform for integrated orbital angular mo-mentum(OAM)multiplexing using planar-compatible plasmonic architectures,with potential applications in structured light generation and high-capacity photonic systems.
年，卷(期)：
2026, 35(8)
机标分类号：
R741.02
U45
O359
在线出版日期：
2026年10月21日
