L-shaped metasurface for both the linear and circular polarization conversions
Abstract
A new type of optical polarization converter based on the L-shaped gold nanoantenna array supercell has been presented, which is suitable for both circular and X/Y linear polarization conversion simultaneously. Both the amplitude and phase of transmitted cross-polarization light can be modulated precisely by changing the lengths and widths of the L-shaped nanoantenna units. For circular or X/Y linear polarization incident lights, the corresponding cross-polarized lights can be obtained in the transmitted lights, and the corresponding bending angles of the cross-polarized lights can be modulated by the structures and the incident angles according to the generalized Snell’s law. The multi-spectral characteristics have also been investigated, in which the operating bandwidth of the designed optical polarization converter is 450 nm (in the range of 750 ∼ 1200 nm).
- Publication:
-
Journal of Optics
- Pub Date:
- June 2015
- DOI:
- 10.1088/2040-8978/17/6/065103
- Bibcode:
- 2015JOpt...17f5103W