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BIBTEX RIS

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

2013; Optica Publishing Group; Volume: 21; Issue: 3 Linguagem: Inglês

10.1364/oe.21.002942

ISSN

1094-4087

Autores

Anders Pors, Sergey I. Bozhevolnyi,

Tópico(s)

Photonic and Optical Devices

Resumo

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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