Journal
OPTICS EXPRESS
Volume 19, Issue 16, Pages 15363-15370Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.19.015363
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- Taiyuan University of Technology
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Plasmonic-induced optical transparency with double split nanoring cavity is investigated with finite difference time domain method. The coupling between the bright third-order mode of split nanoring with one gap and the dark quadrupole mode of split nanoring with two gaps leads to plasmonic analogue of electromagnetically induced transparency. The transparence window is easily modified to the near-infrared and visible range. Numerical results show a group index of 16 with transmission exceeding 0.76 is achieved for double split nanoring cavity. There is large cavity volume of double split nanoring, and the field enhancement inside the cavity is homogenous. Double split nanoring cavity could be a good platform for slow light and sensing applications. (C) 2011 Optical Society of America
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