High-order spoof localized surface plasmons supported on a complementary metallic spiral structure

作者：Gao Zhen; Gao Fei; Zhang Baile^*

来源：Scientific Reports, 2016, 6(1): 24447.

DOI：10.1038/srep24447

We experimentally demonstrate that multiple high-order spoof localized surface plasmons (spoof-LSPs) modes can be supported on a complementary metallic spiral structure, which were absent in the previously reported spoof-LSPs modes. Through exact numerical simulations and near-field imaging experiments, we directly observe these high-order spoof-LSPs modes at microwave frequencies. We also show that these higher-order spoof-LSPs modes exhibit larger frequency shifts caused by the local environmental refractive index change than the previously reported low-order spoof-LSPs modes. Hence the complementary MSS may find potential applications as plasmonic sensor in the microwave and terahertz frequencies.

• 出版日期2016-4-15