Dispersion engineering of metasurfaces for supporting both TM and TE spoof surface plasmon polariton

作者：Meng, Yueyu; Ma, Hua^*; Wang, Jiafu; Lv, Yueguang; Feng, Mingde; Li, Zhiqiang; Qu, Shaobo

来源：Journal of Physics D: Applied Physics , 2018, 51(4): 045109.

DOI：10.1088/1361-6463/aa9fa4

• spoof surface plasmon polaritons
• metasurface
• dispersion
• subwavelength structures

In this study, an anisotropic plasmonic metasurface is proposed to support both TM and TE mode spoof surface plasmon polaritons (SPPs) with the same wave vector. The unit cell consists of a rectangle metal patch with a grounded dielectric substrate. According to the equivalent circuit model, the dispersion relationships of the TM and TE mode spoof SPPs can be manipulated independently by altering different structure parameters. By proper parameters design, the TM and TE mode spoof SPPs working with the same wave vector at the same frequency is achieved. Besides this, a polarization insensitive phase gradient metasurface (PGM) is designed to excite spoof SPPs under linear polarization incident waves. The PGM is designed to have good wave vector matching with the eigen spoof SPPs on the anisotropic plasmonic metasurface. Both the simulations and experiments show that the TM and TE mode spoof SPPs can be excited and propagate with the same wave vector at 8.5 GHz. This work may provide new way in the study of spoof SPPs and have potential in antennas, microwave devices and other practical applications.

• 出版日期2018-1-31
• 单位中国人民解放军空军工程大学; 哈尔滨工业大学