Journal
APPLIED PHYSICS LETTERS
Volume 101, Issue 20, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4767219
Keywords
metamaterials; optical couplers; optical design techniques; optical resonators; polaritons; surface plasmons
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Funding
- National Natural Science Foundation of China [11204378, 11274389]
- National Natural Science Foundation of Shaanxi Province [2011JQ8031]
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Gradient metasurfaces (GMs) can provide pre-defined wave vectors that are along the surface of GMs. When the additional wave vector is greater than that of incident waves, the incident waves can be coupled efficiently as spoof plasmon polaritons (SPPs) even under normal incidence. In this Letter, the design of SPP couplers was proposed based on GMs. A high-efficiency SPP coupler was designed using split-ring resonators. Both the simulation and experiment show that the GM can achieve nearly perfect SPP-coupling under normal incidence at the designed frequency. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4767219]
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