| Autor: |
Shaohua Dong, Zhuo Wang, Huijie Guo, Fuxin Guan, Xiaoer Li, Qiong He, Haibin Zhao, Lei Zhou, Shulin Sun |
| Zdroj: |
Europhysics Letters; Jun2018, Vol. 122 Issue 6, p1-1, 1p |
| Abstrakt: |
Freely tailoring the wavefronts of surface plasmon polaritons (SPPs) is a central goal in plasmonics, but the conventional approaches exhibit low efficiencies and/or require bulky devices. Here, we propose to utilize ultrathin dielectric meta-walls placed vertically on a plasmonic metal to efficiently reshape the wavefront of a launched SPP beam. Based on such a strategy, we experimentally demonstrate two effects in the microwave regime, namely focusing and Bessel beam generations of spoof SPPs. Near-field scanning measurements are in excellent agreement with full wave simulations. This work can stimulate research in many applications related to SPP manipulations, such as enhanced nonlinear effect, nano-particle trapping, and so on. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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