期刊
OPTICS EXPRESS
卷 21, 期 3, 页码 2942-2952出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.21.002942
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- Danish Council for Independent Research [09-072949, 12-124690]
We demonstrate numerically that metal-insulator-metal (MIM) configurations in which the top metal layer consists of a periodic arrangement of nanobricks, thus facilitating gap-surface plasmon resonances, can be designed to function as efficient and broadband quarter-wave plates in reflection by a proper choice of geometrical parameters. Using gold as the metal, we demonstrate quarter-wave plate behavior at lambda similar or equal to 800 nm with an operation bandwidth of 160 nm, conversion efficiency of 82%, and angle of linear polarization fixed throughout the entire bandwidth. This work also includes a detailed analytical and numerical study of the optical properties and underlying physics of structured MIM configurations. (C) 2013 Optical Society of America
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