Abstract
Metasurfaces deployed for generating electromagnetic waves that carry orbital angular momentum (OAM) in the transmission mode are generally inefficient in operation. In this paper, we present a method for the design, fabrication, and characterization of an ultra-Thin metasurface which could be used for generating OAM waves at microwave frequencies with high efficiency. We achieve this objective by proposing a novel bilayer subwavelength scatterer having \pi retardation phase between two orthogonal polarizations of an incident circularly polarized (CP) wave that also have high amplitudes. When analyzed our setup using Jones matrices, we find that the scatterer inverts the spin direction of the incident CP wave with high efficiency. Furthermore, the setup provides full phase control with the spatial rotation of the scatterer as per Pancharatnam-Berry Phase Mechanism. To further illustrate the utility of the proposal, a metasurface was designed based on the proposed scatterer and the generation of OAM waves is validated through both simulations and experimental measurements. To further clarify the points, a rigorous analysis for the transmission and conversion efficiencies is presented.
| Original language | English |
|---|---|
| Article number | 8668536 |
| Pages (from-to) | 4650-4658 |
| Number of pages | 9 |
| Journal | IEEE Transactions on Antennas and Propagation |
| Volume | 67 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 1 Jul 2019 |
Keywords
- Cross polarization
- metasurfaces
- orbital angular momentum (OAM)
- Pancharatnam-Berry phase
Cite this
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Photon spin hall effect-based ultra-thin transmissive metasurface for efficient generation of OAM waves. / Akram, Muhammad Rizwan; Bai, Xudong; Jin, Ronghong; Vandenbosch, Guy A.E.; Premaratne, Malin; Zhu, Weiren.
In: IEEE Transactions on Antennas and Propagation, Vol. 67, No. 7, 8668536, 01.07.2019, p. 4650-4658.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Photon spin hall effect-based ultra-thin transmissive metasurface for efficient generation of OAM waves
AU - Akram, Muhammad Rizwan
AU - Bai, Xudong
AU - Jin, Ronghong
AU - Vandenbosch, Guy A.E.
AU - Premaratne, Malin
AU - Zhu, Weiren
PY - 2019/7/1
Y1 - 2019/7/1
N2 - Metasurfaces deployed for generating electromagnetic waves that carry orbital angular momentum (OAM) in the transmission mode are generally inefficient in operation. In this paper, we present a method for the design, fabrication, and characterization of an ultra-Thin metasurface which could be used for generating OAM waves at microwave frequencies with high efficiency. We achieve this objective by proposing a novel bilayer subwavelength scatterer having \pi retardation phase between two orthogonal polarizations of an incident circularly polarized (CP) wave that also have high amplitudes. When analyzed our setup using Jones matrices, we find that the scatterer inverts the spin direction of the incident CP wave with high efficiency. Furthermore, the setup provides full phase control with the spatial rotation of the scatterer as per Pancharatnam-Berry Phase Mechanism. To further illustrate the utility of the proposal, a metasurface was designed based on the proposed scatterer and the generation of OAM waves is validated through both simulations and experimental measurements. To further clarify the points, a rigorous analysis for the transmission and conversion efficiencies is presented.
AB - Metasurfaces deployed for generating electromagnetic waves that carry orbital angular momentum (OAM) in the transmission mode are generally inefficient in operation. In this paper, we present a method for the design, fabrication, and characterization of an ultra-Thin metasurface which could be used for generating OAM waves at microwave frequencies with high efficiency. We achieve this objective by proposing a novel bilayer subwavelength scatterer having \pi retardation phase between two orthogonal polarizations of an incident circularly polarized (CP) wave that also have high amplitudes. When analyzed our setup using Jones matrices, we find that the scatterer inverts the spin direction of the incident CP wave with high efficiency. Furthermore, the setup provides full phase control with the spatial rotation of the scatterer as per Pancharatnam-Berry Phase Mechanism. To further illustrate the utility of the proposal, a metasurface was designed based on the proposed scatterer and the generation of OAM waves is validated through both simulations and experimental measurements. To further clarify the points, a rigorous analysis for the transmission and conversion efficiencies is presented.
KW - Cross polarization
KW - metasurfaces
KW - orbital angular momentum (OAM)
KW - Pancharatnam-Berry phase
UR - http://www.scopus.com/inward/record.url?scp=85064544447&partnerID=8YFLogxK
U2 - 10.1109/TAP.2019.2905777
DO - 10.1109/TAP.2019.2905777
M3 - Article
VL - 67
SP - 4650
EP - 4658
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
SN - 0018-926X
IS - 7
M1 - 8668536
ER -