Optical cross-polarization converter with an octave bandwidth based on anisotropic plasmonic meta-surfaces
1 Institute of Electromagnetics and Acoustics, Department of Electronic Science, Xiamen University Xiamen 361005, China
2 Department of Electrical and Computer Engineering, Duke University - Durham, NC 27708, USA
Received: 16 June 2015
Accepted: 13 July 2015
We show that the linear polarization state of electromagnetic waves can be efficiently rotated to its orthogonal direction by an alternative design of anisotropic plasmonic meta-surfaces. Numerical results demonstrate that the reflection coefficient converting to cross-polarization after reflection is larger than 71% within an octave frequency band from to . The designed system is much thinner than conventional geometric-optics devices, and takes favorable advantage of little energy loss.
PACS: 78.20.-e – Optical properties of bulk materials and thin films / 78.67.Pt – Multilayers; superlattices; photonic structures; metamaterials
© EPLA, 2015