Efficient and broadband quarter-wave plates by gap-plasmon resonators

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 pr...

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Bibliographic Details
Published inOptics express Vol. 21; no. 3; p. 2942
Main Authors Pors, Anders, Bozhevolnyi, Sergey I.
Format Journal Article
LanguageEnglish
Published United States 11.02.2013
Subjects
Computer Simulation
Computer-Aided Design
Equipment Design
Equipment Failure Analysis
Models, Theoretical
Refractometry - instrumentation
Surface Plasmon Resonance - instrumentation
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ISSN1094-4087
1094-4087
DOI10.1364/OE.21.002942

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Summary: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 λ ~/= 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.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.21.002942