Abstract
Metasurfaces offer unprecedented freedom to manipulate electromagnetic waves at deeply subwavelength scales. However, realizing a highly efficient metasurface, yet simple enough to conceptualize, design, and fabricate, is a challenging task. In this paper, a novel approach is proposed for designing meta-atoms which can achieve full phase control in the range 0–2 π with high efficiency in the transmission mode. In particular, a bilayer meta-atom is designed, exploiting nearly perfect polarization conversion of the two orthogonal transmissions, whose transmission efficiency reaches as high as 85%. The transmission phase control in the circular polarization basis is achieved with the axial rotation of the proposed meta-atom based on Pancharatnam–Berry phase principle. These meta-atoms are then wielded to construct metasurfaces for generating vortex beams carrying orbital angular momentum. The conversion efficiency as high as 75% and a transmission efficiency of 55% are achieved for the realized metasurfaces.
| Original language | English |
|---|---|
| Article number | 1801628 |
| Number of pages | 7 |
| Journal | Advanced Optical Materials |
| Volume | 7 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 4 Jun 2019 |
Keywords
- cross polarization
- metasurfaces
- orbital angular momentum
- Pancharatnam–Berry phase
Cite this
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High efficiency ultrathin transmissive metasurfaces. / Akram, Muhammad Rizwan; Mehmood, Muhammad Qasim; Bai, Xudong; Jin, Ronghong; Premaratne, Malin; Zhu, Weiren.
In: Advanced Optical Materials, Vol. 7, No. 11, 1801628, 04.06.2019.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - High efficiency ultrathin transmissive metasurfaces
AU - Akram, Muhammad Rizwan
AU - Mehmood, Muhammad Qasim
AU - Bai, Xudong
AU - Jin, Ronghong
AU - Premaratne, Malin
AU - Zhu, Weiren
PY - 2019/6/4
Y1 - 2019/6/4
N2 - Metasurfaces offer unprecedented freedom to manipulate electromagnetic waves at deeply subwavelength scales. However, realizing a highly efficient metasurface, yet simple enough to conceptualize, design, and fabricate, is a challenging task. In this paper, a novel approach is proposed for designing meta-atoms which can achieve full phase control in the range 0–2 π with high efficiency in the transmission mode. In particular, a bilayer meta-atom is designed, exploiting nearly perfect polarization conversion of the two orthogonal transmissions, whose transmission efficiency reaches as high as 85%. The transmission phase control in the circular polarization basis is achieved with the axial rotation of the proposed meta-atom based on Pancharatnam–Berry phase principle. These meta-atoms are then wielded to construct metasurfaces for generating vortex beams carrying orbital angular momentum. The conversion efficiency as high as 75% and a transmission efficiency of 55% are achieved for the realized metasurfaces.
AB - Metasurfaces offer unprecedented freedom to manipulate electromagnetic waves at deeply subwavelength scales. However, realizing a highly efficient metasurface, yet simple enough to conceptualize, design, and fabricate, is a challenging task. In this paper, a novel approach is proposed for designing meta-atoms which can achieve full phase control in the range 0–2 π with high efficiency in the transmission mode. In particular, a bilayer meta-atom is designed, exploiting nearly perfect polarization conversion of the two orthogonal transmissions, whose transmission efficiency reaches as high as 85%. The transmission phase control in the circular polarization basis is achieved with the axial rotation of the proposed meta-atom based on Pancharatnam–Berry phase principle. These meta-atoms are then wielded to construct metasurfaces for generating vortex beams carrying orbital angular momentum. The conversion efficiency as high as 75% and a transmission efficiency of 55% are achieved for the realized metasurfaces.
KW - cross polarization
KW - metasurfaces
KW - orbital angular momentum
KW - Pancharatnam–Berry phase
UR - http://www.scopus.com/inward/record.url?scp=85063617545&partnerID=8YFLogxK
U2 - 10.1002/adom.201801628
DO - 10.1002/adom.201801628
M3 - Article
VL - 7
JO - Advanced Optical Materials
JF - Advanced Optical Materials
SN - 2195-1071
IS - 11
M1 - 1801628
ER -