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

Opt Express. 2013 Feb 11;21(3):2942-52. doi: 10.1364/OE.21.002942.

Abstract

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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Computer Simulation
  • Computer-Aided Design
  • Equipment Design
  • Equipment Failure Analysis
  • Models, Theoretical*
  • Refractometry / instrumentation*
  • Surface Plasmon Resonance / instrumentation*