Volume 122, Number 6, June 2018
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||25 July 2018|
Dielectric meta-walls for surface plasmon focusing and Bessel beam generation
1 Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, Green Photonics and Department of Optical Science and Engineering, Fudan University - Shanghai 200433, China
2 State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Fudan University - Shanghai 200433, China
3 Collaborative Innovation Center of Advanced Microstructures - Nanjing 210093, China
4 State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences - Changchun 130033, China
Received: 4 June 2018
Accepted: 3 July 2018
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.
PACS: 78.67.Pt – Multilayers; superlattices; photonic structures; metamaterials / 42.79.-e – Optical elements, devices, and systems / 73.20.Mf – Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)
© EPLA, 2018
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.