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- Title
Polarization Filtering and Phase Controlling Metasurfaces Based on a Metal-Insulator-Metal Grating.
- Authors
Zhang, Zuojun; Luo, Jun; Song, Maowen; Yu, Honglin
- Abstract
Metasurfaces used in the manipulation of light beams have attracted growing interests owing to their unique electromagnetic properties in the subwavelength regime. However, most previously demonstrated single-layer metasurfaces are normally designed to realize one-fold function of either polarization or phase manipulation and suffer from low cross-polarization conversion efficiency and high-background, especially for transmissive metasurfaces. Here, a metasurface based on metal-insulator-metal (MIM) subwavelength grating is proposed to simultaneously achieve polarization filtering and phase controlling. The transmission coefficient reaches up to 78.9% and the polarization extinction ratio (ER = 20*log( T /T ) is larger than 16.1 dB. A local abrupt phase difference covering 0-2 π is introduced into transmitted light with the polarization direction vertical to the grating by artificially tailoring the geometrical parameters of MIM grating. Furthermore, background-free wavefront control and high-purity radial/azimuthal polarization are realized by the metasurfaces based on the MIM grating. This flexible and high-efficient scheme of full control wavefront and polarization promises an unprecedented progress of spatial vectorial beams modulation and enable the realization of novel optical components.
- Subjects
METALLIC surfaces; LIGHT transmission; FILTERS &; filtration; POLARIZATION (Nuclear physics); METAL-insulator transitions; WAVEFRONTS (Optics)
- Publication
Plasmonics, 2017, Vol 12, Issue 6, p1797
- ISSN
1557-1955
- Publication type
Article
- DOI
10.1007/s11468-016-0447-3