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High-Efficiency and Broadband Near-Infrared Bi-Functional Metasurface Based on Rotary Different-Size Silicon Nanobricks.
- Source :
- Nanomaterials (2079-4991); Dec2019, Vol. 9 Issue 12, p1744-1744, 1p
- Publication Year :
- 2019
-
Abstract
- Several novel spin-dependent bi-functional metasurfaces consisting of different-sized rotary silicon nanobricks have been proposed and numerically investigated based on the Pancharatnam–Berry phase and structural phase simultaneously. Here, a transmission mechanism is strictly deduced, which can avoid crosstalk from the multiplexed bi-functional metasurface. Four kinds of high-efficiency bi-functional devices have been designed successfully at infrared wavelengths, including a spin-dependent bi-functional beam deflector, a spin-dependent bi-functional metalens, a bi-functional metasurface with spin-dependent focusing and deflection function, and a spin-dependent bi-functional vortex phase plate. All of the results demonstrate the superior performances of our designed devices. Our work opens up new doors toward building novel spin-dependent bi-functional metasurfaces, and promotes the development of bi-functional devices and spin-controlled photonics. [ABSTRACT FROM AUTHOR]
- Subjects :
- SILICON
VECTOR beams
PHASE modulation
DEFLECTION (Mechanics)
CROSSTALK
PHOTONICS
Subjects
Details
- Language :
- English
- ISSN :
- 20794991
- Volume :
- 9
- Issue :
- 12
- Database :
- Complementary Index
- Journal :
- Nanomaterials (2079-4991)
- Publication Type :
- Academic Journal
- Accession number :
- 140941626
- Full Text :
- https://doi.org/10.3390/nano9121744