期刊
OPTICS EXPRESS
卷 25, 期 21, 页码 25842-25852出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.25.025842
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资金
- National Natural Science Foundation of China (NSFC) [11574219]
- Los Alamos National Laboratory LDRD Program
We investigate edge-coupling of twisted split-ring resonator (SRR) pairs in the terahertz (THz) frequency range. Using a simple coupled-resonator model we show that such a system exhibits resonance splitting and cross-polarization conversion. Numerical simulations and experimental measurements agree well with theoretical calculations, verifying the resonance splitting as a function of the coupling strength given by the SRR separation. We further show that a metal ground plane can be integrated to significantly enhance the resonance coupling, which enables the effective control of resonance splitting and the efficiency and bandwidth of the cross-polarization conversion. Our findings improve the fundamental understanding of metamaterials with a view of accomplishing metamaterial functionalities with enhanced performance, which is of great interest in realizing THz functional devices required in a variety of applications. (C) 2017 Optical Society of America
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