TY - JOUR
T1 - Dielectric meta-walls for surface plasmon focusing and Bessel beam generation
AU - Dong, Shaohua
AU - Wang, Zhuo
AU - Guo, Huijie
AU - Guan, Fuxin
AU - Li, Xiaoer
AU - He, Qiong
AU - Zhao, Haibin
AU - Zhou, Lei
AU - Sun, Shulin
N1 - This work was supported by the National Natural Science Foundation of China (Nos. 11404063, 11474057, 11734007, 11774064, 11674068), the National Key Research and Development of China (2017YFA0303500, 2017YFA0700200), and Shanghai Science and Technology Committee (Nos. 18ZR1403400, 16ZR1445200, 16JC1403100).
Publisher Copyright:
© CopyrightEPLA, 2018.
PY - 2018/6
Y1 - 2018/6
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85051546628&partnerID=8YFLogxK
UR - https://iopscience.iop.org/article/10.1209/0295-5075/122/67002#artAbst
U2 - 10.1209/0295-5075/122/67002
DO - 10.1209/0295-5075/122/67002
M3 - Journal article
AN - SCOPUS:85051546628
SN - 0295-5075
VL - 122
JO - EPL
JF - EPL
IS - 6
M1 - 67002
ER -
