Abstract
Terahertz electromagnetic waves bounded on the microstructures of some metal surfaces are called spoof surface plasmon polaritons (SPPs). Spoof SPPs with high confinement and field enhancement characteristics have significant application prospects. However, it is difficult to guide and control terahertz surface waves due to the lack of effective practical devices. In this paper, the propagation of spoof SPPs is controlled by using a simple structure consisting of metal pillars placed on a metal plate, and the effective index of the unit structure is changed by fine-tuning the size of the pillars. The gradient index (GRIN) lens with variable index is constructed, which realizes the regulation of terahertz wave and lays the foundation for complex integrated devices.
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Gu, S., Sun, M., Zhang, Y. (2022). Terahertz Surface-Plasmon-Polaritons Gradient Index Lens. In: Jain, L.C., Kountchev, R., Tai, Y., Kountcheva, R. (eds) 3D Imaging—Multidimensional Signal Processing and Deep Learning. Smart Innovation, Systems and Technologies, vol 298. Springer, Singapore. https://doi.org/10.1007/978-981-19-2452-1_13
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DOI: https://doi.org/10.1007/978-981-19-2452-1_13
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