Journal
OPTICS COMMUNICATIONS
Volume 285, Issue 16, Pages 3423-3427Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2012.03.023
Keywords
Polarization conversion; Metamaterials; Fano resonance; Electromagnetically induced transparency
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Funding
- Office of Naval Research [N00014-10-1-0929]
- Air Force Office of Scientific Research [FA8650-090-D-5037]
- National Science Foundation [CMMI-0928664]
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Electromagnetically induced transparency and polarization conversion due to interference between two polarization-selective plasmonic resonances coexisting in the same planar metamaterial are studied. The metasurface represents a periodic array of two topologically distinct metamolecules combined on the same substrate: i) monopole antennas connected to wires and supporting a high-Q resonance radiatively coupled to x-polarization, and ii) dipolar antennas supporting a low-Q resonance coupled to y-polarization. We demonstrate that due to the interaction between these modes through a capacitive coupling between the metamolecules, one can observe a circularly-polarized Electromagnetically Induced Transparency (EIT) and thereby achieve an efficient ultra-thin quarter-wave plate. (c) 2012 Elsevier B.V. All rights reserved.
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